Table of contents
Endometriosis affects nearly 10% of women of reproductive age worldwide and often takes up to 10 years to be diagnosed. It is a complex disorder involving the growth of extrauterine tissue similar to the lining of the uterus. It can cause chronic pain, inflammation, and, in some cases, infertility. Recognition is complicated by the diversity of symptoms.
The causes and development of endometriosis are not fully understood. Its onset has been linked to hormonal imbalances, environmental factors, lifestyle (diet, sleep, stress), and genetic predisposition. More recently, it has increasingly been recognized as an immune and inflammatory disorder, exacerbated by cyclical hormonal changes and exposure to environmental toxins.
Conventional treatments, such as surgery and hormone therapy, often fail to produce satisfactory results, leading some affected women to turn to an integrative approach. In this model, practitioners offer support by addressing nutrition, supplementation, and lifestyle while considering the person as a whole. Complementing conventional medicine with these tools can help improve quality of life and alleviate the physical and emotional challenges of the condition.
What is endometriosis?
Endometriosis is a chronic gynaecological condition in which tissue similar to the lining of the uterus grows outside the uterus, most commonly on the ovaries, fallopian tubes, and pelvic peritoneum. Less commonly, this tissue may also be found outside the pelvic region, such as in the chest. It is hormonally sensitive and may bleed and become inflamed during the menstrual cycle, leading to pain, scarring, and adhesions in surrounding tissues and organs [1–3]. Essentially, this is an estrogen-dependent inflammatory process. [4]
Diagnosis is typically based on symptoms and medical history, but definitive confirmation often requires laparoscopic examination [3]. Treatments include drug therapy to restore hormonal balance, surgical interventions to remove endometriotic tissue, and complementary approaches addressing nutrition and lifestyle. The most effective treatment strategies often combine these methods to enhance quality of life and reduce complications. [2]
Types of endometriosis
Endometriosis can be classified into three main types based on the location and depth of tissue growth: Superficial endometriosis – appears on the surface of the peritoneum or on the outer surfaces of organs. Deep infiltrating endometriosis – lesions that can invade the intestines, bladder, or muscular layers of other organs, often causing severe pain and additional symptoms. Ovarian endometriosis – characterised by the formation of large cysts on the ovaries, known as endometriomas, which are often associated with infertility and a higher risk of ovarian cancer.
These types differ in clinical presentation and treatment. Superficial endometriosis is generally associated with milder symptoms, whereas deep infiltrating types often lead to significant pain and gastrointestinal symptoms that may require surgical intervention. [5]
Figure 1. Types of endometriosis
Risk factors and comorbidity of endometriosis
Several factors may increase the risk of developing endometriosis, including a family history of the condition, menstrual cycles shorter than 27 days, prolonged menstruation (lasting more than five days), extended exposure to estrogen, childlessness, low body mass index, and Asian ancestry. [3], [5]
Endometriosis is frequently associated with other gynaecological conditions such as ovarian cysts or Asherman’s syndrome (characterised by uterine adhesions), as well as gastrointestinal disorders like irritable bowel syndrome (IBS) [6–7]. It may also co-occur with systemic issues including infections, allergies, autoimmune diseases, psychiatric conditions, and certain cancers, such as ovarian and breast cancer. Although the underlying reasons for these comorbidities are not yet fully understood, the spread of inflammatory cytokines, microRNAs, and stem cells may contribute. [5]
Symptoms of endometriosis
The severity of symptoms varies greatly and does not necessarily reflect the extent of the condition. Small lesions may cause intense symptoms, while extensive tissue growth might result in mild or no symptoms at all. [2–3], [6]
More common symptoms include:
- Pelvic pain
- Premenstrual cramping
- Painful and prolonged menstruation
- Heavy bleeding
- Pain during or after intercourse
- Difficulty conceiving
Less commonly known symptoms include:
- Gastrointestinal issues (e.g., bloating, nausea, diarrhoea)
- Painful bowel movements or urination (especially during menstruation)
- Lower back pain
- Painful ovulation
- Interstitial cystitis (painful bladder syndrome)
- Chronic fatigue or pain
- Depression and anxiety
How is endometriosis diagnosed?
The diagnostic process for endometriosis typically begins with a review of symptoms and medical history during a consultation with a gynaecologist, especially when the patient presents with pelvic pain or menstrual issues. The physician then performs a physical pelvic examination to palpate the area and identify any tenderness or abnormalities.This is usually followed by an abdominal and/or transvaginal ultrasound, which provides imaging of the reproductive organs and can help detect endometriomas. In some cases, magnetic resonance imaging (MRI) is used to obtain more detailed insights into the location and extent of the lesions. While MRI is useful in visualising endometriotic tissue, laparoscopy remains the gold standard for diagnosis, as it allows for direct visualisation and biopsy of the suspected areas. During laparoscopy, surgeons can also carry out immediate treatment interventions if needed [3], [6]. Endometriosis may also be discovered incidentally, since not all cases present with noticeable symptoms.
In addition to conventional diagnostic tools, functional medicine recommends further laboratory testing to gain a more comprehensive understanding of the condition. These are explored in the following section. [2]
The development of endometriosis
Throughout evolution, multicellular organisms have developed three fundamental principles for tissue organisation: repairing DNA damage caused by internal or external factors, responding to external signals for cell division, and maintaining strict adherence to their genetically assigned location. Endometriosis appears to defy the third principle. Whether influenced by internal or environmental triggers, endometrial-like cells have lost their ability to remain in their designated place within the uterus [5]. Two leading theories attempt to explain the ‘migration’ of these cells: retrograde menstruation and extrauterine stem cell activity. However, neither theory fully accounts for all the clinical and pathological characteristics of the condition. [5]
The precise causes and mechanisms behind the development of endometriosis remain unclear, with ongoing research exploring various contributing factors including hormonal imbalances, genetic predisposition, environmental influences, and lifestyle factors such as diet, sleep, and stress [2]. Furthermore, endometriosis is increasingly recognised as an immune and inflammatory disorder, aggravated by cyclical hormonal shifts and environmental toxins.
Understanding the complex and multifactorial nature of endometriosis is essential for developing effective treatments and improving patients’ quality of life.
Figure 2. Factors associated with the development of endometriosis
Factors associated with the development of endometriosis
Can endometriosis be treated?
Conventional medicine tools for the treatment of endometriosis
When creating a treatment plan for endometriosis, healthcare providers consider several factors: the severity of the disease, the patient’s age, desire for future pregnancy, and the intensity of symptoms—particularly pain [3]. Conventional treatment strategies focus primarily on pain management and improving fertility, using a combination of medications and surgical options. While many patients experience symptom relief after surgery, this is often temporary, with symptoms returning within a few years. Hormonal treatments may also come with unpleasant side effects.
In some cases, symptoms improve spontaneously—particularly after menopause, during pregnancy, or while breastfeeding. However, most patients require ongoing treatment to manage their condition [1], [21]. To achieve the best outcomes, combining multiple therapeutic approaches as early as possible is recommended. [3]
Tools of functional medicine in the treatment of endometriosis
Endometriosis is characterised by chronic inflammation, elevated estrogen activity, and immune dysfunction. The functional medicine approach aims to address these root causes by using targeted dietary and lifestyle interventionsto reduce inflammation and support healthy hormone metabolism, ultimately helping to relieve symptoms and improve quality of life. [23]
Figure 3. Tools of functional medicine in the treatment of endometriosis
Nutrition and supplementation for endometriosis
Useful foods and diets
An anti-inflammatory diet plays a crucial role in managing endometriosis. To help relieve symptoms, it’s important to eliminate inflammatory, ultra-processed foods and focus on fresh, whole foods. This supports gut healing, helps rebalance the microbiome, and reduces systemic inflammation. [1]
Foods that reduce inflammation include fruits, vegetables, and sources of omega-3 fatty acids such as fish, eggs, nuts, and seeds (e.g., flaxseed) [23]. In addition to their anti-inflammatory properties, fruits and vegetables are rich in fibre, which supports healthy bowel movements and plays a key role in the detoxification process [1]. Certain plant compounds are especially beneficial: carotenoids and flavonoids found in dark green vegetables (e.g., kale, spinach, pak choy, watercress, broccoli, chard); beta-carotene found in orange and yellow vegetables and fruits (e.g., carrots, peppers, mangoes). Bromelain, which is also an anti-inflammatory enzyme, is found in pineapple [23]. Incorporating these foods into a Mediterranean-style diet—rich in vegetables, healthy fats, and whole foods—can help alleviate symptoms and improve overall quality of life [2], [24]. Additional gut-supportive options include bone broth, collagen, and fermented foods, which help maintain intestinal lining integrity. [1]
Maintaining hormonal balance is equally important, as high estrogen levels can worsen symptoms. Supporting liver and bowel function is key to clearing excess estrogen from the body. Foods high in fibre, including cruciferous vegetables (e.g. broccoli, Brussels sprouts, cabbage), beetroot, watercress, and artichokes, help metabolise estrogen. In particular, indole-3-carbinol, found in cruciferous vegetables, aids in binding and eliminating excess estrogen [1]. Phytoestrogens—plant compounds found in flaxseed, apples, and chickpeas—may help balance estrogen levels by exerting anti-estrogenic effects, although the role of soy remains debated. [23]
A low-glycaemic diet is also recommended, as high insulin levels can drive inflammation. Including sufficient protein and healthy fats (such as oily fish, eggs, and flaxseed) supports stable blood sugar and provides nutrients like vitamin D, which helps improve immune tolerance—a key factor in addressing the root causes of endometriosis. [23]
Finally, it’s worth noting that meat from organically raised, pasture-fed animals and wild game tends to contain higher levels of omega-3 fatty acids than that of conventionally farmed livestock. Choosing organic produce whenever possible also helps reduce exposure to xenoestrogens, which can interfere with hormonal balance. [23]
Foods to avoid
Reducing or eliminating inflammatory foods is just as important as incorporating beneficial ones. This supports a healthy gut microbiome, helps control chronic inflammation, and contributes to better hormonal balance. [2]
Foods to avoid or limit include: those high in sugar, trans fats, and omega-6 fatty acids; refined carbohydrates (e.g., white bread, pasta, cakes, biscuits); processed and fried foods; factory-farmed meat; caffeine; and alcohol. [1–2], [23]
In addition, some individuals may benefit from an elimination diet, which involves temporarily removing certain foods to identify sensitivities or intolerances. In the context of endometriosis, it is especially worth considering the elimination of dairy products and gluten, as these can contribute to inflammation and immune dysfunction in susceptible individuals. [1–2], [23]
Dietary supplementation
A variety of evidence-based supplements and herbs can help alleviate symptoms of endometriosis by reducing inflammation, supporting hormone balance, and promoting tissue repair. [2]
Anti-inflammatory herbs and active compounds:
- Ginger
- Cinnamon
- Cloves
- Green tea
- Turmeric (curcumin)
- Rosemary (carnosol)
- Chilli pepper (capsaicin)
- Berries such as blueberries, cranberries, and grapes (resveratrol, pterostilbene)
- Frankincense (boswellia) [1]
- Pine bark extract (pycnogenol): One study found that women who took 60 mg daily for 48 weeks experienced a gradual but steady reduction in symptoms. [23]
- Chaste tree (Vitex) is another traditional herb that may help regulate the menstrual cycle and hormonal balance. [2]
- The immune-boosting flavonoid quercetin—found naturally in apples, berries, vegetables, broccoli, cauliflower, cabbage, Brussels sprouts, olive oil, capers, and onions—is also worth highlighting. [1], [23]
- Modified citrus pectin (MCP)—a soluble fibre derived from citrus peels—can block galectin-3, a protein involved in fibrosis and inflammation. MCP also acts as a gentle chelator (binding toxins and heavy metals) and a prebiotic, promoting beneficial gut bacteria growth.
- Liver-supporting supplements are crucial for healthy hormone metabolism and detoxification. Examples include: milk thistle – traditionally used to protect the liver from toxin-induced damage, including that caused by heavy metals; N-acetylcysteine (NAC) – an antioxidant that reduces tissue damage and inflammation; as well as alpha-lipoic acid (ALA) and glutathione – powerful antioxidants that support detoxification and immune function. One study showed that three months of NAC supplementation significantly reduced cyst size and pain in women with endometriosis. [1–2]
- Lastly, probiotics and prebiotics help maintain a healthy gut microbiome: Probiotics are beneficial live bacteria that help restore gut microbiome balance. Prebiotics are dietary fibres that feed and support these good bacteria.
|
Dietary supplement |
Effects |
Natural sources |
|---|---|---|
|
It has anti-inflammatory and immunomodulatory properties. Adequate levels may help control the survival and growth of endometrial tissues, regulate hormonal balance, and its supplementation may reduce endometriosis-related pain and improve quality of life. |
Sunlight, fatty fish, egg yolks, liver, and certain mushrooms. |
|
|
Vitamin A |
It plays an important role in the health of the digestive system, reproductive organs, and the pelvic mucosa, and supports efficient estrogen metabolism. Beta-carotene is a precursor of vitamin A. Its proper function also depends on adequate levels of vitamins D and K. |
Orange and yellow vegetables and fruits, dark leafy greens, eggs, and liver. |
|
It enhances cellular immunity and supports the barrier function of mucosal tissues, making it essential for maintaining healthy tissue function in both the gut and the pelvic region. |
Light-colored fresh vegetables and fruits, as well as dark leafy greens. |
|
|
Vitamin E |
Women with endometriosis tend to have lower levels of this antioxidant, which may contribute to increased inflammation and excessive growth of endometrial tissue. |
Nuts and seeds—especially sunflower seeds, pine nuts, almonds, and hazelnuts—as well as avocado, spinach, and olive oil. |
|
B vitamins |
In addition to supporting the conversion of essential fatty acids into their beneficial, anti-inflammatory forms, B vitamins are also essential for efficient estrogen metabolism in the liver. Vitamin B6, in particular, has been shown to reduce the intensity and duration of menstrual pain. |
Meat and fish, organ meats, eggs, legumes, beans, red lentils, Brussels sprouts, spinach, lettuce, beets, radishes, flaxseeds, and sunflower seeds. |
|
Essential Fatty Acids |
These are indispensable for healthy hormonal function. It is important to maintain a proper balance between omega-3 and omega-6 fatty acids—ideally in a ratio of about 1:1 to 1:4. Zinc and vitamin B6 are also necessary for their metabolism and for their conversion into beneficial prostaglandins. These are lipid molecules with anti-inflammatory, hormone-like effects in the body. |
Good sources include oily fish such as sardines, salmon, mackerel, herring, and trout. |
|
Magnesium |
Magnesium supports liver detoxification, promoting the elimination of excess estrogen and supporting immune function. |
Brazil nuts, eggs, sunflower seeds, liver, fish, and chia seeds. |
| Iodine | Iodine has anti-inflammatory properties, supports hormonal balance (including the reduction of estrogen dominance), and contributes to immune system function. | Seaweeds and algae, fish and other seafood, eggs, and iodized salt. |
Table 1. Essential vitamins and nutrients for women with endometriosis [23]
Overall, adopting an appropriate diet combined with targeted nutritional supplements offers promising potential for managing endometriosis—particularly when guided by a qualified specialist. This integrative approach can support the restoration of hormonal balance and help alleviate symptoms. Various dietary strategies, including vitamin supplementation (e.g. vitamins D, A, C, and E), omega-3 fatty acids, turmeric, and therapeutic diets such as the Mediterranean or low FODMAP diets, have been shown to positively influence the course of the disease. [4]
Minimising environmental toxicity in endometriosis
Xenoestrogens are synthetic or environmental chemicals that mimic estrogen in the body. By disrupting hormonal balance, they can contribute to estrogen dominance—a key driver of endometriosis. Many xenoestrogens are found in plastics. To reduce exposure: Avoid foods wrapped in soft plastic film or stored in plastic containers. Do not microwave food in plastic, as heat can release more of these chemicals into your food [1]. Canned foods often contain BPA in their lining, another xenoestrogen linked to reproductive issues. Phthalates, found in many plastics, also disrupt endocrine function. Switching to glass containers and bottles, using a home water filter, and opting for reusable BPA-free or stainless steel water bottles are practical steps to limit exposure [23]. Home furnishings and materials—such as adhesives used in carpets or furniture—can also release harmful chemicals, so it’s wise to consider non-toxic alternatives when possible.
Food sources matter too. Commercial meat and dairy often contain growth hormones, which may interfere with the body’s natural hormone balance. Choosing grass-fed, free-range, and organic products helps minimise intake of these added hormones. Likewise, pesticides and insecticides used in conventional agriculture can affect hormone function, making organic produce a safer choice. To make the best choices, it is important to be aware of the most commonly contaminated foods and plan your shopping accordingly. [23]
Finally, personal care products also play a role. Many shampoos, soaps, detergents, and cosmetics contain parabensand phenoxyethanol, which can be absorbed directly through the skin and bypass the liver’s detoxification system. Choosing skincare and household products made from natural ingredients can significantly reduce this exposure. [23]
Move to manage endometriosis
Physical activity supports the immune system, which plays a key role in the development and progression of endometriosis. Exercise can also help regulate hormone levels, reduce chronic pain, improve sleep, manage stress, and lower systemic inflammation—all important aspects of endometriosis management. [4]
However, is this supported by scientific evidence? Two systematic reviews have explored the connection between exercise and endometriosis. While some studies show a protective effect or pain reduction, others have found no significant impact. These mixed results suggest that more research is needed to identify effective exercise programmes tailored to individuals with endometriosis. [4]
It’s also important to recognise that excessive or inappropriate exercise can disrupt hormonal balance, so finding the right type, intensity, and duration of activity is key [25]. Gentle forms of movement, such as yoga, Pilates, walking, and tai chi, can help reduce inflammation and stimulate the release of endorphins, the body’s natural pain-relieving hormones. Exercise also supports lymphatic circulation, which helps the body eliminate excess estrogen. Moderate aerobic activity can enhance serotonin levels and overall well-being, but overexertion may act as a barrier to healing in some cases [22]. On days when energy levels are higher, it may be beneficial to choose short, high-intensity workouts—such as HIIT (High-Intensity Interval Training)—instead of long, strenuous cardio sessions. This helps maintain the benefits of exercise without overstimulating the stress response. Excessive and prolonged exercise can increase inflammation and raise cortisol levels, potentially leading to hormonal imbalances. [23]
The role of sleep improvement in endometriosis
Women with endometriosis often experience poorer sleep quality compared to those without the condition. Disrupted sleep may be linked to pelvic pain, painful bladder syndrome, and other symptoms that negatively affect quality of life and mood. Studies have shown that women with endometriosis also tend to have lower pressure pain thresholds in the diaphragm and abdomen—an indication of increased central sensitivity often associated with disturbed sleep. [4]
Even mild but regular sleep deprivation (less than 7–8 hours per night) can increase stress levels, reduce pain tolerance, and amplify symptoms. This can create a vicious cycle, where poor sleep worsens symptoms, and symptoms disrupt sleep—ultimately contributing to chronic pain and fatigue. [23]
To support healthy sleep: Stick to a consistent bedtime and wake-up schedule. Avoid digital screens before bed, as blue light can interfere with melatonin production. Engage in calming pre-sleep routines, such as a warm bath or herbal tea. Prioritising sleep hygiene can help restore hormonal balance, reduce inflammation, and improve emotional and physical resilience. [23]
Stress management for endometriosis
Endometriosis is not only a physical condition—it’s also linked to chronic emotional stress. Persistent stress can weaken immune function, particularly the activity of natural killer (NK) cells, which play a role in controlling endometrial lesions. Stress also contributes to hormonal imbalances, affecting estrogen and progesterone levels and worsening symptoms [1]. Animal studies have confirmed that stress can lead to increased lesion size, reinforcing the importance of stress reduction as part of symptom management. [1]
Effective stress management techniques include: breathing exercises, mindfulness meditation, guided imagery – a visualization technique for calming the nervous system, and mind-body therapies, such as cognitive behavioural therapy (CBT) or biofeedback, also show promise for people with endometriosis. [1], [23–24]
Stress relief doesn’t always require structured techniques. Sometimes, it can be as simple as: meeting a close friend, going for a walk in nature, listening to music, or enjoying a good book. These small acts of self-care can have a meaningful impact on pain perception, inflammation, and emotional well-being. [23]
Other therapies for endometriosis
In addition to medical and lifestyle interventions, a range of complementary therapies can support women in managing endometriosis-related pain and improving daily quality of life. Acupuncture has shown promising results. In one study conducted by Harvard Medical School, participants experienced a 62% reduction in pain after just four weeks of acupuncture treatment [23]. Chiropractic care, focusing on the spine and surrounding soft tissues, may also be beneficial, particularly when combined with manual therapies like massage and pelvic floor physiotherapy. These approaches can help reduce stress, improve circulation, and ease pelvic pain. Electro-physical therapies, such as: Transcutaneous electrical nerve stimulation (TENS), Neuromuscular electrical stimulation (NMES) can also provide pain relief and enhance the effectiveness of other treatments. These complementary therapies offer more than just symptom control—they can empower women with endometriosis to take an active role in their healing journey and reclaim quality of life. [2], [24]
Endometriosis presents uniquely in each woman, affecting multiple systems in complex ways. The most effective treatment approach is one that’s individualised, reflecting a woman’s life goals, health status, and the specific impact of the disease on her well-being. The functional medicine model honours this individuality by considering each patient’s biochemistry, lifestyle, and environmental exposures. It offers personalized recommendations that support hormonal balance, reduce pain and inflammation, and promote long-term healing and resilience.
References
[1] ‘A Functional-Medicine Approach to Endometriosis’, Experience Life, Sep. 21, 2023 https://experiencelife.lifetime.life/article/a-functional-medicine-approach-to-endometriosis/
[2] H. Yoshimura, ‘Functional Medicine Approaches to Endometriosis: Managing Pain and Improving Quality of Life’, Rupa Health, Mar. 16, 2023 https://www.rupahealth.com/post/integrative-approaches-to-endometriosis
[3] ‘What Is Endometriosis?’, Cleveland Clinic https://my.clevelandclinic.org/health/diseases/10857-endometriosis
[4] ‘Endometriosis: Root Causes & Lifestyle Interventions’, The Institute for Functional Medicine https://www.ifm.org/news-insights/endometriosis-root-causes-lifestyle-interventions/
[5] Y. Wang, K. Nicholes, and I.-M. Shih, ‘The Origin and Pathogenesis of Endometriosis’, Annu. Rev. Pathol. Mech. Dis., vol. 15, no. Volume 15, 2020, pp. 71–95, Jan. 2020, DOI: https://doi.org/10.1146/annurev-pathmechdis-012419-032654
↓ Read More ↓Table of contents
Endometriosis affects nearly 10% of women of reproductive age worldwide and often takes up to 10 years to be diagnosed. It is a complex disorder involving the growth of extrauterine tissue similar to the lining of the uterus. It can cause chronic pain, inflammation, and, in some cases, infertility. Recognition is complicated by the diversity of symptoms.
The causes and development of endometriosis are not fully understood. Its onset has been linked to hormonal imbalances, environmental factors, lifestyle (diet, sleep, stress), and genetic predisposition. More recently, it has increasingly been recognized as an immune and inflammatory disorder, exacerbated by cyclical hormonal changes and exposure to environmental toxins.
Conventional treatments, such as surgery and hormone therapy, often fail to produce satisfactory results, leading some affected women to turn to an integrative approach. In this model, practitioners offer support by addressing nutrition, supplementation, and lifestyle while considering the person as a whole. Complementing conventional medicine with these tools can help improve quality of life and alleviate the physical and emotional challenges of the condition.
What is endometriosis?
Endometriosis is a chronic gynaecological condition in which tissue similar to the lining of the uterus grows outside the uterus, most commonly on the ovaries, fallopian tubes, and pelvic peritoneum. Less commonly, this tissue may also be found outside the pelvic region, such as in the chest. It is hormonally sensitive and may bleed and become inflamed during the menstrual cycle, leading to pain, scarring, and adhesions in surrounding tissues and organs [1–3]. Essentially, this is an estrogen-dependent inflammatory process. [4]
Diagnosis is typically based on symptoms and medical history, but definitive confirmation often requires laparoscopic examination [3]. Treatments include drug therapy to restore hormonal balance, surgical interventions to remove endometriotic tissue, and complementary approaches addressing nutrition and lifestyle. The most effective treatment strategies often combine these methods to enhance quality of life and reduce complications. [2]
Types of endometriosis
Endometriosis can be classified into three main types based on the location and depth of tissue growth: Superficial endometriosis – appears on the surface of the peritoneum or on the outer surfaces of organs. Deep infiltrating endometriosis – lesions that can invade the intestines, bladder, or muscular layers of other organs, often causing severe pain and additional symptoms. Ovarian endometriosis – characterised by the formation of large cysts on the ovaries, known as endometriomas, which are often associated with infertility and a higher risk of ovarian cancer.
These types differ in clinical presentation and treatment. Superficial endometriosis is generally associated with milder symptoms, whereas deep infiltrating types often lead to significant pain and gastrointestinal symptoms that may require surgical intervention. [5]
Figure 1. Types of endometriosis
Risk factors and comorbidity of endometriosis
Several factors may increase the risk of developing endometriosis, including a family history of the condition, menstrual cycles shorter than 27 days, prolonged menstruation (lasting more than five days), extended exposure to estrogen, childlessness, low body mass index, and Asian ancestry. [3], [5]
Endometriosis is frequently associated with other gynaecological conditions such as ovarian cysts or Asherman’s syndrome (characterised by uterine adhesions), as well as gastrointestinal disorders like irritable bowel syndrome (IBS) [6–7]. It may also co-occur with systemic issues including infections, allergies, autoimmune diseases, psychiatric conditions, and certain cancers, such as ovarian and breast cancer. Although the underlying reasons for these comorbidities are not yet fully understood, the spread of inflammatory cytokines, microRNAs, and stem cells may contribute. [5]
Symptoms of endometriosis
The severity of symptoms varies greatly and does not necessarily reflect the extent of the condition. Small lesions may cause intense symptoms, while extensive tissue growth might result in mild or no symptoms at all. [2–3], [6]
More common symptoms include:
- Pelvic pain
- Premenstrual cramping
- Painful and prolonged menstruation
- Heavy bleeding
- Pain during or after intercourse
- Difficulty conceiving
Less commonly known symptoms include:
- Gastrointestinal issues (e.g., bloating, nausea, diarrhoea)
- Painful bowel movements or urination (especially during menstruation)
- Lower back pain
- Painful ovulation
- Interstitial cystitis (painful bladder syndrome)
- Chronic fatigue or pain
- Depression and anxiety
How is endometriosis diagnosed?
The diagnostic process for endometriosis typically begins with a review of symptoms and medical history during a consultation with a gynaecologist, especially when the patient presents with pelvic pain or menstrual issues. The physician then performs a physical pelvic examination to palpate the area and identify any tenderness or abnormalities.This is usually followed by an abdominal and/or transvaginal ultrasound, which provides imaging of the reproductive organs and can help detect endometriomas. In some cases, magnetic resonance imaging (MRI) is used to obtain more detailed insights into the location and extent of the lesions. While MRI is useful in visualising endometriotic tissue, laparoscopy remains the gold standard for diagnosis, as it allows for direct visualisation and biopsy of the suspected areas. During laparoscopy, surgeons can also carry out immediate treatment interventions if needed [3], [6]. Endometriosis may also be discovered incidentally, since not all cases present with noticeable symptoms.
In addition to conventional diagnostic tools, functional medicine recommends further laboratory testing to gain a more comprehensive understanding of the condition. These are explored in the following section. [2]
The development of endometriosis
Throughout evolution, multicellular organisms have developed three fundamental principles for tissue organisation: repairing DNA damage caused by internal or external factors, responding to external signals for cell division, and maintaining strict adherence to their genetically assigned location. Endometriosis appears to defy the third principle. Whether influenced by internal or environmental triggers, endometrial-like cells have lost their ability to remain in their designated place within the uterus [5]. Two leading theories attempt to explain the ‘migration’ of these cells: retrograde menstruation and extrauterine stem cell activity. However, neither theory fully accounts for all the clinical and pathological characteristics of the condition. [5]
The precise causes and mechanisms behind the development of endometriosis remain unclear, with ongoing research exploring various contributing factors including hormonal imbalances, genetic predisposition, environmental influences, and lifestyle factors such as diet, sleep, and stress [2]. Furthermore, endometriosis is increasingly recognised as an immune and inflammatory disorder, aggravated by cyclical hormonal shifts and environmental toxins.
Understanding the complex and multifactorial nature of endometriosis is essential for developing effective treatments and improving patients’ quality of life.
Figure 2. Factors associated with the development of endometriosis
Factors associated with the development of endometriosis
Can endometriosis be treated?
Conventional medicine tools for the treatment of endometriosis
When creating a treatment plan for endometriosis, healthcare providers consider several factors: the severity of the disease, the patient’s age, desire for future pregnancy, and the intensity of symptoms—particularly pain [3]. Conventional treatment strategies focus primarily on pain management and improving fertility, using a combination of medications and surgical options. While many patients experience symptom relief after surgery, this is often temporary, with symptoms returning within a few years. Hormonal treatments may also come with unpleasant side effects.
In some cases, symptoms improve spontaneously—particularly after menopause, during pregnancy, or while breastfeeding. However, most patients require ongoing treatment to manage their condition [1], [21]. To achieve the best outcomes, combining multiple therapeutic approaches as early as possible is recommended. [3]
Tools of functional medicine in the treatment of endometriosis
Endometriosis is characterised by chronic inflammation, elevated estrogen activity, and immune dysfunction. The functional medicine approach aims to address these root causes by using targeted dietary and lifestyle interventionsto reduce inflammation and support healthy hormone metabolism, ultimately helping to relieve symptoms and improve quality of life. [23]
Figure 3. Tools of functional medicine in the treatment of endometriosis
Nutrition and supplementation for endometriosis
Useful foods and diets
An anti-inflammatory diet plays a crucial role in managing endometriosis. To help relieve symptoms, it’s important to eliminate inflammatory, ultra-processed foods and focus on fresh, whole foods. This supports gut healing, helps rebalance the microbiome, and reduces systemic inflammation. [1]
Foods that reduce inflammation include fruits, vegetables, and sources of omega-3 fatty acids such as fish, eggs, nuts, and seeds (e.g., flaxseed) [23]. In addition to their anti-inflammatory properties, fruits and vegetables are rich in fibre, which supports healthy bowel movements and plays a key role in the detoxification process [1]. Certain plant compounds are especially beneficial: carotenoids and flavonoids found in dark green vegetables (e.g., kale, spinach, pak choy, watercress, broccoli, chard); beta-carotene found in orange and yellow vegetables and fruits (e.g., carrots, peppers, mangoes). Bromelain, which is also an anti-inflammatory enzyme, is found in pineapple [23]. Incorporating these foods into a Mediterranean-style diet—rich in vegetables, healthy fats, and whole foods—can help alleviate symptoms and improve overall quality of life [2], [24]. Additional gut-supportive options include bone broth, collagen, and fermented foods, which help maintain intestinal lining integrity. [1]
Maintaining hormonal balance is equally important, as high estrogen levels can worsen symptoms. Supporting liver and bowel function is key to clearing excess estrogen from the body. Foods high in fibre, including cruciferous vegetables (e.g. broccoli, Brussels sprouts, cabbage), beetroot, watercress, and artichokes, help metabolise estrogen. In particular, indole-3-carbinol, found in cruciferous vegetables, aids in binding and eliminating excess estrogen [1]. Phytoestrogens—plant compounds found in flaxseed, apples, and chickpeas—may help balance estrogen levels by exerting anti-estrogenic effects, although the role of soy remains debated. [23]
A low-glycaemic diet is also recommended, as high insulin levels can drive inflammation. Including sufficient protein and healthy fats (such as oily fish, eggs, and flaxseed) supports stable blood sugar and provides nutrients like vitamin D, which helps improve immune tolerance—a key factor in addressing the root causes of endometriosis. [23]
Finally, it’s worth noting that meat from organically raised, pasture-fed animals and wild game tends to contain higher levels of omega-3 fatty acids than that of conventionally farmed livestock. Choosing organic produce whenever possible also helps reduce exposure to xenoestrogens, which can interfere with hormonal balance. [23]
Foods to avoid
Reducing or eliminating inflammatory foods is just as important as incorporating beneficial ones. This supports a healthy gut microbiome, helps control chronic inflammation, and contributes to better hormonal balance. [2]
Foods to avoid or limit include: those high in sugar, trans fats, and omega-6 fatty acids; refined carbohydrates (e.g., white bread, pasta, cakes, biscuits); processed and fried foods; factory-farmed meat; caffeine; and alcohol. [1–2], [23]
In addition, some individuals may benefit from an elimination diet, which involves temporarily removing certain foods to identify sensitivities or intolerances. In the context of endometriosis, it is especially worth considering the elimination of dairy products and gluten, as these can contribute to inflammation and immune dysfunction in susceptible individuals. [1–2], [23]
Dietary supplementation
A variety of evidence-based supplements and herbs can help alleviate symptoms of endometriosis by reducing inflammation, supporting hormone balance, and promoting tissue repair. [2]
Anti-inflammatory herbs and active compounds:
- Ginger
- Cinnamon
- Cloves
- Green tea
- Turmeric (curcumin)
- Rosemary (carnosol)
- Chilli pepper (capsaicin)
- Berries such as blueberries, cranberries, and grapes (resveratrol, pterostilbene)
- Frankincense (boswellia) [1]
- Pine bark extract (pycnogenol): One study found that women who took 60 mg daily for 48 weeks experienced a gradual but steady reduction in symptoms. [23]
- Chaste tree (Vitex) is another traditional herb that may help regulate the menstrual cycle and hormonal balance. [2]
- The immune-boosting flavonoid quercetin—found naturally in apples, berries, vegetables, broccoli, cauliflower, cabbage, Brussels sprouts, olive oil, capers, and onions—is also worth highlighting. [1], [23]
- Modified citrus pectin (MCP)—a soluble fibre derived from citrus peels—can block galectin-3, a protein involved in fibrosis and inflammation. MCP also acts as a gentle chelator (binding toxins and heavy metals) and a prebiotic, promoting beneficial gut bacteria growth.
- Liver-supporting supplements are crucial for healthy hormone metabolism and detoxification. Examples include: milk thistle – traditionally used to protect the liver from toxin-induced damage, including that caused by heavy metals; N-acetylcysteine (NAC) – an antioxidant that reduces tissue damage and inflammation; as well as alpha-lipoic acid (ALA) and glutathione – powerful antioxidants that support detoxification and immune function. One study showed that three months of NAC supplementation significantly reduced cyst size and pain in women with endometriosis. [1–2]
- Lastly, probiotics and prebiotics help maintain a healthy gut microbiome: Probiotics are beneficial live bacteria that help restore gut microbiome balance. Prebiotics are dietary fibres that feed and support these good bacteria.
|
Dietary supplement |
Effects |
Natural sources |
|---|---|---|
|
It has anti-inflammatory and immunomodulatory properties. Adequate levels may help control the survival and growth of endometrial tissues, regulate hormonal balance, and its supplementation may reduce endometriosis-related pain and improve quality of life. |
Sunlight, fatty fish, egg yolks, liver, and certain mushrooms. |
|
|
Vitamin A |
It plays an important role in the health of the digestive system, reproductive organs, and the pelvic mucosa, and supports efficient estrogen metabolism. Beta-carotene is a precursor of vitamin A. Its proper function also depends on adequate levels of vitamins D and K. |
Orange and yellow vegetables and fruits, dark leafy greens, eggs, and liver. |
|
It enhances cellular immunity and supports the barrier function of mucosal tissues, making it essential for maintaining healthy tissue function in both the gut and the pelvic region. |
Light-colored fresh vegetables and fruits, as well as dark leafy greens. |
|
|
Vitamin E |
Women with endometriosis tend to have lower levels of this antioxidant, which may contribute to increased inflammation and excessive growth of endometrial tissue. |
Nuts and seeds—especially sunflower seeds, pine nuts, almonds, and hazelnuts—as well as avocado, spinach, and olive oil. |
|
B vitamins |
In addition to supporting the conversion of essential fatty acids into their beneficial, anti-inflammatory forms, B vitamins are also essential for efficient estrogen metabolism in the liver. Vitamin B6, in particular, has been shown to reduce the intensity and duration of menstrual pain. |
Meat and fish, organ meats, eggs, legumes, beans, red lentils, Brussels sprouts, spinach, lettuce, beets, radishes, flaxseeds, and sunflower seeds. |
|
Essential Fatty Acids |
These are indispensable for healthy hormonal function. It is important to maintain a proper balance between omega-3 and omega-6 fatty acids—ideally in a ratio of about 1:1 to 1:4. Zinc and vitamin B6 are also necessary for their metabolism and for their conversion into beneficial prostaglandins. These are lipid molecules with anti-inflammatory, hormone-like effects in the body. |
Good sources include oily fish such as sardines, salmon, mackerel, herring, and trout. |
|
Magnesium |
Magnesium supports liver detoxification, promoting the elimination of excess estrogen and supporting immune function. |
Brazil nuts, eggs, sunflower seeds, liver, fish, and chia seeds. |
| Iodine | Iodine has anti-inflammatory properties, supports hormonal balance (including the reduction of estrogen dominance), and contributes to immune system function. | Seaweeds and algae, fish and other seafood, eggs, and iodized salt. |
Table 1. Essential vitamins and nutrients for women with endometriosis [23]
Overall, adopting an appropriate diet combined with targeted nutritional supplements offers promising potential for managing endometriosis—particularly when guided by a qualified specialist. This integrative approach can support the restoration of hormonal balance and help alleviate symptoms. Various dietary strategies, including vitamin supplementation (e.g. vitamins D, A, C, and E), omega-3 fatty acids, turmeric, and therapeutic diets such as the Mediterranean or low FODMAP diets, have been shown to positively influence the course of the disease. [4]
Minimising environmental toxicity in endometriosis
Xenoestrogens are synthetic or environmental chemicals that mimic estrogen in the body. By disrupting hormonal balance, they can contribute to estrogen dominance—a key driver of endometriosis. Many xenoestrogens are found in plastics. To reduce exposure: Avoid foods wrapped in soft plastic film or stored in plastic containers. Do not microwave food in plastic, as heat can release more of these chemicals into your food [1]. Canned foods often contain BPA in their lining, another xenoestrogen linked to reproductive issues. Phthalates, found in many plastics, also disrupt endocrine function. Switching to glass containers and bottles, using a home water filter, and opting for reusable BPA-free or stainless steel water bottles are practical steps to limit exposure [23]. Home furnishings and materials—such as adhesives used in carpets or furniture—can also release harmful chemicals, so it’s wise to consider non-toxic alternatives when possible.
Food sources matter too. Commercial meat and dairy often contain growth hormones, which may interfere with the body’s natural hormone balance. Choosing grass-fed, free-range, and organic products helps minimise intake of these added hormones. Likewise, pesticides and insecticides used in conventional agriculture can affect hormone function, making organic produce a safer choice. To make the best choices, it is important to be aware of the most commonly contaminated foods and plan your shopping accordingly. [23]
Finally, personal care products also play a role. Many shampoos, soaps, detergents, and cosmetics contain parabensand phenoxyethanol, which can be absorbed directly through the skin and bypass the liver’s detoxification system. Choosing skincare and household products made from natural ingredients can significantly reduce this exposure. [23]
Move to manage endometriosis
Physical activity supports the immune system, which plays a key role in the development and progression of endometriosis. Exercise can also help regulate hormone levels, reduce chronic pain, improve sleep, manage stress, and lower systemic inflammation—all important aspects of endometriosis management. [4]
However, is this supported by scientific evidence? Two systematic reviews have explored the connection between exercise and endometriosis. While some studies show a protective effect or pain reduction, others have found no significant impact. These mixed results suggest that more research is needed to identify effective exercise programmes tailored to individuals with endometriosis. [4]
It’s also important to recognise that excessive or inappropriate exercise can disrupt hormonal balance, so finding the right type, intensity, and duration of activity is key [25]. Gentle forms of movement, such as yoga, Pilates, walking, and tai chi, can help reduce inflammation and stimulate the release of endorphins, the body’s natural pain-relieving hormones. Exercise also supports lymphatic circulation, which helps the body eliminate excess estrogen. Moderate aerobic activity can enhance serotonin levels and overall well-being, but overexertion may act as a barrier to healing in some cases [22]. On days when energy levels are higher, it may be beneficial to choose short, high-intensity workouts—such as HIIT (High-Intensity Interval Training)—instead of long, strenuous cardio sessions. This helps maintain the benefits of exercise without overstimulating the stress response. Excessive and prolonged exercise can increase inflammation and raise cortisol levels, potentially leading to hormonal imbalances. [23]
The role of sleep improvement in endometriosis
Women with endometriosis often experience poorer sleep quality compared to those without the condition. Disrupted sleep may be linked to pelvic pain, painful bladder syndrome, and other symptoms that negatively affect quality of life and mood. Studies have shown that women with endometriosis also tend to have lower pressure pain thresholds in the diaphragm and abdomen—an indication of increased central sensitivity often associated with disturbed sleep. [4]
Even mild but regular sleep deprivation (less than 7–8 hours per night) can increase stress levels, reduce pain tolerance, and amplify symptoms. This can create a vicious cycle, where poor sleep worsens symptoms, and symptoms disrupt sleep—ultimately contributing to chronic pain and fatigue. [23]
To support healthy sleep: Stick to a consistent bedtime and wake-up schedule. Avoid digital screens before bed, as blue light can interfere with melatonin production. Engage in calming pre-sleep routines, such as a warm bath or herbal tea. Prioritising sleep hygiene can help restore hormonal balance, reduce inflammation, and improve emotional and physical resilience. [23]
Stress management for endometriosis
Endometriosis is not only a physical condition—it’s also linked to chronic emotional stress. Persistent stress can weaken immune function, particularly the activity of natural killer (NK) cells, which play a role in controlling endometrial lesions. Stress also contributes to hormonal imbalances, affecting estrogen and progesterone levels and worsening symptoms [1]. Animal studies have confirmed that stress can lead to increased lesion size, reinforcing the importance of stress reduction as part of symptom management. [1]
Effective stress management techniques include: breathing exercises, mindfulness meditation, guided imagery – a visualization technique for calming the nervous system, and mind-body therapies, such as cognitive behavioural therapy (CBT) or biofeedback, also show promise for people with endometriosis. [1], [23–24]
Stress relief doesn’t always require structured techniques. Sometimes, it can be as simple as: meeting a close friend, going for a walk in nature, listening to music, or enjoying a good book. These small acts of self-care can have a meaningful impact on pain perception, inflammation, and emotional well-being. [23]
Other therapies for endometriosis
In addition to medical and lifestyle interventions, a range of complementary therapies can support women in managing endometriosis-related pain and improving daily quality of life. Acupuncture has shown promising results. In one study conducted by Harvard Medical School, participants experienced a 62% reduction in pain after just four weeks of acupuncture treatment [23]. Chiropractic care, focusing on the spine and surrounding soft tissues, may also be beneficial, particularly when combined with manual therapies like massage and pelvic floor physiotherapy. These approaches can help reduce stress, improve circulation, and ease pelvic pain. Electro-physical therapies, such as: Transcutaneous electrical nerve stimulation (TENS), Neuromuscular electrical stimulation (NMES) can also provide pain relief and enhance the effectiveness of other treatments. These complementary therapies offer more than just symptom control—they can empower women with endometriosis to take an active role in their healing journey and reclaim quality of life. [2], [24]
Endometriosis presents uniquely in each woman, affecting multiple systems in complex ways. The most effective treatment approach is one that’s individualised, reflecting a woman’s life goals, health status, and the specific impact of the disease on her well-being. The functional medicine model honours this individuality by considering each patient’s biochemistry, lifestyle, and environmental exposures. It offers personalized recommendations that support hormonal balance, reduce pain and inflammation, and promote long-term healing and resilience.
References
[1] ‘A Functional-Medicine Approach to Endometriosis’, Experience Life, Sep. 21, 2023 https://experiencelife.lifetime.life/article/a-functional-medicine-approach-to-endometriosis/
[2] H. Yoshimura, ‘Functional Medicine Approaches to Endometriosis: Managing Pain and Improving Quality of Life’, Rupa Health, Mar. 16, 2023 https://www.rupahealth.com/post/integrative-approaches-to-endometriosis
[3] ‘What Is Endometriosis?’, Cleveland Clinic https://my.clevelandclinic.org/health/diseases/10857-endometriosis
[4] ‘Endometriosis: Root Causes & Lifestyle Interventions’, The Institute for Functional Medicine https://www.ifm.org/news-insights/endometriosis-root-causes-lifestyle-interventions/
[5] Y. Wang, K. Nicholes, and I.-M. Shih, ‘The Origin and Pathogenesis of Endometriosis’, Annu. Rev. Pathol. Mech. Dis., vol. 15, no. Volume 15, 2020, pp. 71–95, Jan. 2020, DOI: https://doi.org/10.1146/annurev-pathmechdis-012419-032654
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