Endometriosis and Gut Microbiome: What the Studies Show

Which bacteria change, the gut enzyme that made lesions grow in mice, and the herbs, formulas and therapies Ayurveda uses to work the terrain.

August 21, 2026  ·  12 min read  ·  Elsa Ramos Elías

You have spent years organising the month around the pain. And alongside the pain, a digestion that runs on its own schedule: bloating that has nothing to do with what you ate, evenings when the waistband stops closing, a gut that alternates between constipation and urgency without warning. Most likely you were told these are two separate things, and that the second one is "stress" or IBS.

In consultation those two arrive together almost every time, and for about five years the research has been looking exactly there. Endometriosis affects one in ten women of reproductive age, rising to 20-50% among those seen for infertility or chronic pelvic pain. It is an estrogen-dependent disease sitting on an inflammatory background, so once the science described how the gut regulates the estrogen circulating in you, the link between endometriosis and gut microbiome stopped being an exotic hypothesis.

Here is what has been found, with the numbers, and then how the gut is actually worked in Ayurveda: which plants, which formulas, which therapies, and what changes according to who you are.

Why your gut decides how much estrogen circulates

The piece that explains it is called the estrobolome, the set of bacterial genes that metabolise estrogen. Your liver packages used estrogen for elimination; certain colonic bacteria produce an enzyme called beta-glucuronidase that reopens that package and returns active estrogen to circulation. In a disease that feeds on estrogen, any mechanism raising its availability matters.

There is a second mechanism, independent of the hormonal one. Dysbiosis damages the gut barrier and lets lipopolysaccharide through, the LPS of gram-negative bacteria. That LPS activates the TLR4/NF-κB pathway, which is an engine of inflammation. In endometriosis, that inflammatory background is precisely what allows lesions to implant and grow instead of being cleared by your immune system.

Put differently: your gut is not a spectator to your endometriosis. It participates by two distinct routes, the hormonal and the inflammatory.

Beta-glucuronidase: the strongest finding

If anything holds across the whole endometriosis and gut microbiome literature, it is the enzyme. Wei and colleagues measured it in blood and found it more than twice as high in women with endometriosis, and overexpressed inside the lesions themselves (collected in the systematic review by Saponara and colleagues, BMC Women's Health, 2025, DOI).

And here is the finding that turns an association into something more serious. In the animal model, beta-glucuronidase was injected into mice at two different doses: the size and number of lesions rose in proportion to the dose. The loop closes with M2 macrophages, the type that predominates in lesions, which produce three times more enzyme than M1 and which estradiol stimulates. Estrogen makes your immune cells manufacture more enzyme, the enzyme releases more estrogen, and the loop feeds itself.

Endometriosis and gut microbiome: which bacteria change

The studies flag different taxa depending on who is looking. Wei found enrichment of Desulfovibrio, Bilophila and Eggerthellaceae; Pai found Eisenbergiella and Hungatella, several of them known beta-glucuronidase producers; the 2026 Spanish cohort found 18 taxa differing significantly, with correlations to pain and infertility. No single species repeats across all of them.

And the largest study, with 1,000 women, found no differences in diversity or in enzyme activity: it identified 28 species of differing abundance and not one survived statistical correction. There is a simple technical explanation for the disagreement: different bacterial genes encode beta-glucuronidases, and being enriched in a bacterium does not mean producing more enzyme. Which is why no microbiome test is validated for endometriosis today, and why the kits sold to the public measure none of this reliably.

"The signal is real and worth researching. Turning it into a treatment sold today is something else, and whoever does that is not informing you, they are selling to you." — Elsa Ramos

Why work the terrain if you already have treatment

Hormonal treatment does a job Ayurveda does not do, and does it well: progestins such as dienogest are the mainstay of endometriosis management and they reduce pain while you take them. It is worth knowing how they work, and the literature says it without hedging: they are a suppressive treatment. They act on lesion activity while they are in your body. Bleeding irregularities are a known effect, to the point that the expert review recommends explaining them to a woman before she starts (Murji and colleagues, Curr Med Res Opin, 2020, DOI).

That is where the other half comes in. Your digestion, your transit, the inflammatory background and the way you metabolise and clear estrogen are not the target of any hormonal treatment, and they are exactly the terrain Ayurveda has been working for centuries and that microbiome research has only just started to describe in its own vocabulary. Suppressing lesion activity and improving the terrain it appears on are two different layers of one problem. Which is why this is not a choice.

What Ayurveda assesses in a woman with endometriosis

Ayurveda has no single word for "endometriosis", just as it had none for most diseases we now diagnose by imaging. It has something different, which is a description of the process. The two cases published in the Journal of Ayurveda and Integrative Medicine that you will see below were classified as vatiki yonivyapad with paripluta, and as udavarta yonivyapada. In both, the recurring word is the same: vata.

Specifically apana vata, the subtype governing all downward movement in the pelvis: menstruation, elimination, birth. When that movement reverses or gets blocked, the classical texts describe exactly the picture we now call retrograde menstruation. And the principal seat of vata is the colon, which is why chronic constipation is never treated here as a secondary detail, and why the endometriosis and gut microbiome research reads as so familiar to anyone trained in this tradition.

What I look at in a first session

When a woman with endometriosis arrives, this is what I am reading:

• The direction of apana. Your transit, whether there is constipation, trapped gas, pain that arrives before the bleeding and eases once it starts, pain on passing stool during your period.
• The state of agni, your digestive fire. If you digest poorly you generate ama, a badly processed residue that obstructs channels and feeds inflammation. This is where the classical reading and the research on gut barrier and LPS shake hands.
• Which dosha dominates your picture. Heavy, hot bleeding with clots and burning is a pitta picture; dry, spasmodic pain with scant dark bleeding is vata. The strategy changes completely, which is why two women with the same gynaecological diagnosis do not get the same plan.
• Rasa and rakta dhatu, the tissues of nourishment and blood. Anaemia from heavy bleeding is not collateral damage, it is part of the picture and it is treated.
• Your nervous system and your sleep. Chronic pain keeps vata disturbed, and disturbed vata amplifies pain. Working only on the gut without touching this yields half the result.

The herbs and formulas used, one by one

These are the classical herbs and formulas this terrain is worked with, and what is known of each today in the context of endometriosis and gut microbiome. I name them because I think you are entitled to know what we are talking about, not so that you go and buy them.

A repertoire is not a protocol

What you see here is the repertoire, not a protocol. Which formula, at what dose, at what point in your cycle and for how long depends on your constitution, your agni, your degree of anaemia, and the medication you are already taking. The same plant can be right for one woman and wrong for the one next to her.

• Ashoka (Saraca asoca) and its classical preparation, Ashokarishta. The uterine herb par excellence of the tradition, indicated above all for heavy bleeding. A relevant data point: in an animal model of estrogenicity, neither Ashoka nor Ashokarishta showed estrogenic activity, which matters when your disease depends on estrogen. A randomized trial is currently running in India with 140 women, comparing Ashokarishta 20 ml plus Trinakantamani pishti 250 mg twice daily against tranexamic acid over three months (Rajput and colleagues, JMIR Res Protoc, 2025, DOI); results are not published yet.
• Kanchanar guggulu. The classical formula for granthi, growths and masses, and one of the most used in this context in India's ayurvedic hospitals. It is prescribed by reading the whole picture, not the imaging report.
• Shatavari (Asparagus racemosus). A rasayana for the female reproductive system, used in the background work and in the recovery phase, not at the peak of pain.
• Turmeric (haridra). The classical anti-inflammatory and one of the plants most leaned on in background work. The form you take it in changes a great deal of what it does, which is why the specific formula and what accompanies it matter.
• Triphala and guduchi (Tinospora cordifolia). This is the gut leg of the work, the one dealing with agni, transit and ama. It is also where the classical approach overlaps most with what microbiome research is describing. Kitchari belongs here too, giving the gut a rest without stopping nourishment.

The therapies: basti, virechana, and what is not done online

The herbs are half of it. The other half are the therapies, and in endometriosis the principal one is basti, the medicated enema, because it acts directly on the seat of vata. It has been the treatment of choice for vata-type pelvic pain for centuries, and it is what is still done today in India's ayurvedic hospitals. Two of those treatments are documented in indexed journals:

• A 6.9 × 5 cm endometrioma in a 23-year-old woman (Jadhav, J Ayurveda Integr Med, 2023, DOI), with acute intermittent abdominal pain and surgery recommended. She was treated with yoga basti, a series of eight medicated enemas, plus Kuberaksha vati. The pain resolved and surgery was avoided. Within a year the endometrioma had gone from 10.3 × 5.5 cm to 7.6 × 5.2 cm, and she conceived and delivered at term.
• Ten years of primary infertility associated with endometriosis in a 32-year-old (Asmabi and colleagues, J Ayurveda Integr Med, 2024, DOI), after hormonal therapy and several failed attempts at IUI, ICSI and IVF. The protocol combined virechana, therapeutic purgation, with basti and uttara basti. She conceived at five months and delivered a 2.8 kg girl at term.

Why you will not find randomized trials here

These are documented clinical cases, with their figures and their follow-up. And something should be said about the format, because it gets used to dismiss all of this in one stroke: the randomized trial requires standardising the intervention, giving everyone the same thing. Ayurveda does the opposite, choosing the treatment for each woman, so the design treated as the gold standard is structurally at odds with the method. It is not that the evidence is missing, it is that the measuring instrument was built for something else. Which is why what exists are cases and series, and why the order of work they show matters so much: prepare and clear the terrain first, then nourish, and only then the local work. That is what tends to be missing when someone hands you a list of supplements.

What is done online and what is not

And now what I cannot do. Uttara basti is an intrauterine procedure, and full virechana is a supervised clinical process. Neither is done over a video call, and anyone offering them online is selling something they cannot deliver. I work in online consultation, and what does work that way is the full assessment, the food plan for your constitution, the formulas and their doses, the work on agni and transit, the daily routine, and rebuilding your digestion. When a case calls for a clinical procedure, I say so and point you to where it is done.

Who should be cautious

• Do not buy a probiotic promising to act on endometriosis, or a microbiome test expecting an answer about your disease: none is validated for that. The general frame is in what probiotics can and cannot do.
• If you are on hormonal treatment (contraceptive, dienogest, GnRH analogues): the herbs are chosen and sequenced around it, not beside it. Say so in the first session.
• If you are anaemic from heavy bleeding. It is very common here and it changes priorities: that is corrected first, everything else follows.
• If you are trying to conceive or in an assisted reproduction cycle. The calendar rules, and several formulas and therapies are withdrawn or rescheduled.
• If you take anticoagulants or antiplatelet drugs. High-dose turmeric and some formulas interact; it needs adjusting.
• If your gut is badly irritated or you are in an acute pain flare. This is not the moment to start with a cleanse; the ground is prepared first.

Frequently asked questions

Does the gut microbiome cause endometriosis?

It has not been shown to cause it. What human studies show is an association: women with endometriosis carry different bacterial profiles and higher serum beta-glucuronidase. The strongest data comes from the animal model, where injecting that enzyme increased both the size and the number of lesions in proportion to the dose. The reasonable reading today is that the microbiome participates in the terrain the disease progresses on, by two routes: the hormonal one, recycling estrogen you should be clearing, and the inflammatory one, through LPS crossing a damaged gut barrier. That terrain can be worked on.

Do probiotics help with endometriosis?

No clinical trial supports it today and no specific strain carries an indication in endometriosis, so if a jar names your disease on the label, the label is ahead of the evidence. What does have backing in its own right is sustaining bacterial diversity and the gut barrier, and that is achieved sooner with a range of plant fibers, digestible food and regular elimination than with a capsule. The short-chain fatty acids your bacteria make from fiber hold the tight junctions of the gut together, and in the animal model of endometriosis they were reduced.

Can I take Ayurvedic formulas while on hormonal treatment?

Generally yes, and they are planned around that treatment rather than beside it. Two things matter: that whoever prescribes them knows exactly what you are taking, including the dose, and that the formula has traceable provenance. One relevant data point: Ashoka and its preparation Ashokarishta showed no estrogenic activity in the immature rat model of estrogenicity, which matters when your disease depends on estrogen. With anticoagulants or antiplatelet drugs the plan needs adjusting, since high-dose turmeric and some formulas interact. And if you are in an assisted reproduction cycle, the calendar rules: several formulas and therapies are withdrawn or rescheduled.

How long before gut work makes a difference?

Digestive changes, bloating and transit, usually move within the first few weeks, and they are the first thing you notice because they are what you can measure daily. Anything tied to the cycle is assessed over full cycles rather than days, so the first sensible checkpoint is two or three periods. That is also the order the work follows: prepare and clear the terrain first, then nourish, and only then the local work. The Ashokarishta trial currently running uses a three-month window, which is a reasonable reference for deciding whether something is working.

Your next step

If you have endometriosis and your digestion has been failing for years, those two things are explained together, and the endometriosis and gut microbiome research points exactly there. Working on the gut improves the terrain everything else happens on, and you feel it day to day: in the pain of the days before, in the bloating, in the energy you reach the end of the month with.

Which formula is yours, at what dose, at what point in your cycle and in what order is what we look at together in an ayurveda online consultation. You leave it with a written plan, not with a list of capsules.