Polycystic Ovary Syndrome (PCOS) affects up to 1 in 10 people, yet nearly 70% remain undiagnosed (Azziz et al., 2004; Teede et al., 2010). While PCOS is often viewed as a hormonal disorder, it’s far more complex than that. PCOS is a multi-system condition that impacts everything from metabolism and mood to fertility and cardiovascular health.
This is a topic that is near and dear to my heart. I dived into the Institute of Restorative Health curriculum out of a deep need to reclaim my life from PCOS. After one month of a gut healing protocol, my menstrual cycle made a comeback after being a no-show for 15 years.
Here’s what many practitioners miss: supporting someone with PCOS doesn’t begin with a hormone protocol—it starts with the gut.
As Restorative Health Practitioners, if you’re working with anyone in the menstrual cycling population, you’re going to see PCOS, whether it’s been diagnosed or not. It’s one of the most common, underrecognized conditions we encounter, and it requires a functional, root-cause approach to see lasting change.
What is PCOS?
PCOS is not just a hormonal problem. It’s a multi-system condition that impacts every aspect of a person’s life.
Common symptoms may include:
- Irregular or absent menstrual periods
- Anovulation
- Cystic acne
- Hirsutism (facial/body hair)
- Thinning scalp hair
- Weight gain or obesity
- Fatigue and insulin resistance
- Infertility
- Anxiety and/or depression
Long-term risks are equally daunting—those with PCOS:
- Are 4 times more likely to develop type 2 diabetes (Legro et al., 1999; Moran et al., 2010)
- Are 2 times more likely to experience cardiovascular disease, endometrial cancer, and depression (Wild et al., 2010; Barry et al., 2014; Cooney et al., 2017)
- Have a 30–50% miscarriage rate—up to 3 times higher than in people without PCOS (Boomsma et al., 2006)
- Face a 30% higher risk of sleep apnea, which further impacts immunity, brain health, and hormone balance (Vgontzas et al., 2001; Fogel et al., 2001)
Beating the Odds
Despite the challenges people with PCOS face, there is hope. Unfortunately, most people with PCOS don’t know that. They are told that their symptoms are permanent, and that their dreams of losing weight, having a baby, or clearing up their skin are for other people but not for them.
When someone is diagnosed with PCOS, they’re often handed birth control pills and told that there’s nothing that can be done to reverse the debilitating symptoms they’re experiencing.
As a Restorative Health Practitioner, you have an opportunity to help clients with PCOS reclaim their lives and their dreams. But to do that, the step-by-step process to help them heal may not start where you would expect.
At the Institute of Restorative Health, we teach practitioners to look for root causes, not just manage symptoms. And in the case of PCOS, gut health must be prioritized in order to build a long-term healing strategy that reduces inflammation, balances blood sugar levels, and restores equilibrium to the endocrine system.
The Gut-Hormone Connection
Our gastrointestinal system does far more than process food. It governs immunity, detoxification, and nutrient absorption. And what most people don’t realize is that it plays an integral role in hormone metabolism and signaling.
Research shows those with PCOS have significantly different microbial populations compared to healthy controls, with notable shifts in diversity and abundance linked to hormonal and metabolic dysfunction (Qi et al., 2022).
Hormones don’t just need to be balanced—they need to be cleared. And that job belongs to the digestive system.
The liver packages estrogens, androgens, and insulin breakdown products for elimination via bile and urine. Liver detoxification can be impaired due to inflammation, poor nutrient status, and toxic load.
Phase II liver detox—especially glucuronidation—is key for estrogen metabolism. But if the gut is overproducing beta-glucuronidase, hormone imbalances will continue.
During glucuronidation, the liver neutralizes estrogen which is akin to putting garbage in a trash bag. Once that estrogen is packaged up, it travels along a bile highway to the estrobolome.
The estrobolome is a collection of gut microbes capable of metabolizing estrogens. These microbes produce an enzyme called beta-glucuronidase, which can deconjugate estrogens that were meant to be excreted, allowing them to be recirculated back into the body. This is akin to taking the garbage out for early morning pick up, only to find it back in your kitchen by dinner.
In healthy balance, the estrobolome is an important part of normal estrogen recycling. But in people with dysbiosis or constipation, beta-glucuronidase activity is often too high, leading to impaired hormone clearance.
The Hormone Gatekeeper
Inflammation is now recognized as a core feature of PCOS. A 2023 review confirms that PCOS involves a complex imbalance of pro‑ and anti‑inflammatory cytokines that interact with insulin resistance, adiposity, gut dysbiosis, and endocrine dysfunction (Frontiers in Immunology, 2023).
Gut permeability (aka “leaky gut”) allows bacterial endotoxins like lipopolysaccharides (LPS) to escape into the bloodstream, activating systemic inflammation. This immune activation doesn’t just disrupt ovarian function—it also suppresses the liver’s production of sex hormone-binding globulin (SHBG).
SHBG is a protein produced by the liver that binds to sex hormones—primarily testosterone, estrogen (estradiol), and DHT (dihydrotestosterone)—and carries them through the bloodstream in an inactive, bound form. Only the unbound or “free” hormones are biologically active and able to enter cells to exert their effects.
Think of SHBG as the chaperone at a high school dance. It will only allow a certain number of hormones onto the dance floor at any given time. When insulin and inflammation are high, it drives SHBG low, resulting in too many hormones on the dance floor—causing acne, hirsutism, infertility, and other PCOS symptoms.
Gut-Blood Sugar Axis: Microbiome Meets Metabolism
Blood sugar dysregulation and insulin resistance are nearly universal in PCOS, and the microbiome is deeply involved in both. Blood sugar regulation is an essential part of every PCOS recovery plan, but it must be built upon the foundation of optimized gut function.
Healthy gut bacteria help regulate blood sugar by producing short-chain fatty acids (SCFAs) like butyrate, which improve insulin sensitivity and reduce inflammation. Dysbiosis reduces SCFA production and increases gut-derived endotoxins like LPS, which interfere with insulin receptor function. This phenomenon—known as metabolic endotoxemia—explains how gut-driven inflammation can precede and drive insulin resistance (Cani et al., 2007).
Akkermansia is a beneficial mucin-degrading bacteria that supports SCFA production and is a key player in maintaining gut lining integrity, regulating inflammation, and supporting metabolic health—all of which directly impact PCOS. While direct human PCOS trials are still limited, Akkermansia supplementation has improved insulin sensitivity, reduced inflammation, and improved gut barrier function in overweight and insulin-resistant populations (Depommier et al., 2019).
Balancing blood sugar levels isn’t just about eating less sugar. If fat or protein digestion is compromised, it’s nearly impossible to nourish the body and resolve blood sugar issues long term. This is where functional testing becomes crucial. A GI MAP stool test is an invaluable part of your clinical toolset to help your PCOS client uncover how digestive dysfunction is playing into their symptoms.
FAQ
The following FAQs expand on the clinical frameworks outlined above to support a root-cause, gut-first strategy for addressing PCOS in practice.
How common is PCOS, and how often is it undiagnosed?
PCOS affects up to 1 in 10 people, and nearly 70% remain undiagnosed. Because it presents as a multi-system condition—not just a reproductive disorder—many cases are overlooked. Practitioners working with cycling populations will encounter PCOS frequently, diagnosed or not.
Is PCOS just a hormonal disorder?
No, PCOS is a multi-system condition involving metabolic, inflammatory, endocrine, and digestive dysfunction. It impacts fertility, mood, cardiovascular risk, and blood sugar regulation. Treating it as purely hormonal often misses root drivers.
Why should PCOS protocols start with gut health?
PCOS protocols should begin with gut health because digestion and the microbiome directly influence inflammation, insulin resistance, and hormone metabolism. The gut regulates immune activation, detoxification, nutrient absorption, and hormone clearance—all central to long-term improvement.
What is the gut-hormone connection in PCOS?
The gut influences hormone metabolism, signaling, and elimination. The liver packages hormones for excretion, but gut microbes—especially those in the estrobolome—can reactivate estrogens through beta-glucuronidase activity. Dysbiosis and constipation can therefore impair hormone clearance.
What role does beta-glucuronidase play in estrogen imbalance?
Elevated beta-glucuronidase can deconjugate estrogens meant for elimination, leading to hormone recirculation. In PCOS patients with dysbiosis, excessive activity may contribute to persistent hormonal imbalance by interfering with proper estrogen clearance.
How does gut permeability contribute to PCOS inflammation?
Gut permeability allows endotoxins like lipopolysaccharides (LPS) into circulation, triggering systemic inflammation. This inflammatory cascade disrupts ovarian function and suppresses hepatic SHBG production, worsening hormonal symptoms.
How does inflammation affect SHBG in PCOS?
Inflammation and elevated insulin suppress liver production of sex hormone-binding globulin (SHBG). Lower SHBG increases free, biologically active hormones such as testosterone and DHT, contributing to acne, hirsutism, and infertility.
What is the gut-blood sugar axis in PCOS?
The gut microbiome directly influences insulin sensitivity and blood sugar regulation. Healthy bacteria produce short-chain fatty acids (SCFAs) like butyrate that improve insulin signaling, while dysbiosis increases endotoxins that impair insulin receptor function.
What is metabolic endotoxemia, and why does it matter in PCOS?
Metabolic endotoxemia refers to low-grade inflammation caused by gut-derived endotoxins like LPS entering circulation. This process can precede and drive insulin resistance, a nearly universal feature of PCOS.
What is the role of Akkermansia in PCOS?
Akkermansia is a beneficial mucin-degrading bacterium that supports gut barrier integrity, inflammation regulation, and metabolic health. Although direct PCOS trials are limited, supplementation has improved insulin sensitivity and reduced inflammation in overweight and insulin-resistant populations.
How does impaired digestion contribute to hormonal dysfunction in PCOS?
Poor digestion limits nutrient absorption and disrupts hormone production and clearance.
Common contributors include:
- Low stomach acid
- Sluggish bile flow or gallbladder dysfunction
- Pancreatic insufficiency
- Enzyme insufficiency
Without adequate protein and fat digestion, hormone synthesis and metabolic stability suffer.
What stool test markers are clinically relevant in PCOS?
On a GI MAP stool test, key markers include Akkermansia levels, beta-glucuronidase, inflammatory-producing bacteria, steatocrit, and elastase. These markers help identify microbial imbalance, impaired fat digestion, and inflammatory drivers influencing PCOS symptoms.
What dietary pattern supports gut-driven PCOS recovery?
A nutrient-dense, high-fiber, low-carbohydrate diet is generally a good fit for people with PCOS. Fiber supports microbial balance and hormone clearance, while carbohydrate moderation helps stabilize blood sugar and reduce inflammatory signaling.
References
Azziz, R., Woods, K. S., Reyna, R., Key, T. J., Knochenhauer, E. S., & Yildiz, B. O. (2004). The prevalence and features of the polycystic ovary syndrome in an unselected population. Journal of Clinical Endocrinology & Metabolism, 89(6), 2745–2749.
Teede, H. J., Misso, M. L., Deeks, A. A., Moran, L. J., Stuckey, B. G., Wong, J. L. A., … & Costello, M. F. (2010). Assessment and management of polycystic ovary syndrome: summary of an evidence-based guideline. Medical Journal of Australia, 195(6), S65–S112.
Legro, R. S., Kunselman, A. R., Dodson, W. C., & Dunaif, A. (1999). Prevalence and predictors of risk for type 2 diabetes mellitus and impaired glucose tolerance in polycystic ovary syndrome: a prospective, controlled study in 254 affected women. Journal of Clinical Endocrinology & Metabolism, 84(1), 165–169.
Moran, L. J., Misso, M. L., Wild, R. A., & Norman, R. J. (2010). Impaired glucose tolerance, type 2 diabetes and metabolic syndrome in polycystic ovary syndrome: a systematic review and meta-analysis. Human Reproduction Update, 16(4), 347–363.
Wild, R. A., Rizzo, M., Clifton, S., & Carmina, E. (2010). Lipid levels in polycystic ovary syndrome: systematic review and meta-analysis. Fertility and Sterility, 94(1), 260–269.
Barry, J. A., Azizia, M. M., & Hardiman, P. J. (2014). Risk of endometrial, ovarian and breast cancer in women with polycystic ovary syndrome: a systematic review and meta-analysis. Human Reproduction Update, 20(5), 748–758.
Cooney, L. G., & Dokras, A. (2017). Depression and anxiety in polycystic ovary syndrome: etiology and treatment. Current Psychiatry Reports, 19(11), 83.
Boomsma, C. M., Eijkemans, M. J. C., Hughes, E. G., Visser, G. H. A., Fauser, B. C. J. M., & Macklon, N. S. (2006). A meta-analysis of pregnancy outcomes in women with polycystic ovary syndrome. Human Reproduction Update, 12(6), 673–683.
Vgontzas, A. N., Legro, R. S., Bixler, E. O., Grayev, A., Kales, A., & Chrousos, G. P. (2001). Polycystic ovary syndrome is associated with obstructive sleep apnea and daytime sleepiness: role of insulin resistance. Journal of Clinical Endocrinology & Metabolism, 86(2), 517–520.
Fogel, R. B., Malhotra, A., & White, D. P. (2001). Sleep. Annals of Internal Medicine, 134(7), 654–662.
Qi, X., Yun, C., Pang, Y. et al. (2022). The Gut Microbiota–Hormones Axis in PCOS: Insights into Clinical Practice. Front Endocrinol, 13: 867968.
Tremellen, K., & Pearce, K. (2012). Dysbiosis of Gut Microbiota (DOGMA) – A novel theory for the development of Polycystic Ovarian Syndrome. Medical Hypotheses, 79(1): 104–112.
Cani, P.D., et al. (2007). Metabolic endotoxemia initiates obesity and insulin resistance. Diabetes, 56(7): 1761–1772.
Depommier, C., Everard, A., Druart, C., Plovier, H., Van Hul, M., Vieira-Silva, S., Falony, G., & Cani, P. D. (2019). Supplementation with Akkermansia muciniphila in overweight and obese human volunteers: A proof-of-concept exploratory study. Nature Medicine, 25(7), 1096–1103.
Asghari, M. R., Ramezani Tehrani, F., & Ghaffari, S. (2023). Dysregulation of immune response in PCOS organ system. Frontiers in Immunology, 14, 1169232.
ABOUT THE AUTHOR:
Ishbel Cavaleri, FNTP, MRHP
Ishbel specializes in working with clients who have testosterone imbalances via a gut-first approach. She holds a MRHP certificate and has helped facilitate phenomenal success for her clients using IRH tools. Outside of work she is all about quality time with loved ones, reading, running & yoga/Pilates.
