If you have PCOS, or suspect you do, you may have seen the news this week. After more than a decade of advocacy and research, Polycystic Ovary Syndrome has officially been renamed. It is now called Polyendocrine Metabolic Ovarian Syndrome, or PMOS. The name change was published in The Lancet on May 12, 2026, following a process that included surveys from over 22,000 patients, clinicians, and researchers.
For those of us who have long understood this condition as a metabolic disorder, this is a significant moment, not because it changes what we do clinically, but because it finally changes the conversation.
Why the Name Change Matters
The old name, Polycystic Ovary Syndrome, was actually always a misnomer. The "cysts" seen on ultrasound are not pathological cyst but rather arrested follicles, a downstream consequence of hormonal and metabolic dysfunction, not the cause of it. And yet for decades, that name shaped how the condition was understood, diagnosed, and treated and in many cases had us overlooking the endocrine and metabolic root cause of this condition.
In fact, it is estimated that up to 70% of women with PCOS (now PMOS) have gone undiagnosed. Many of these women have been told their labs were normal (without running the right ones), handed a prescription for birth control, or told that they are "lucky" that they skip their periods and can put on muscle so easily.
What Does This Mean for the Conventional Approach
On one hand, this name change has the potential to open doors. If PMOS is recognized as a metabolic condition, we may see broader access to metabolic testing, better insurance coverage for labs like fasting insulin and advanced lab panels, and more providers running a real workup instead of defaulting to oral contraceptives as a first-line treatment.
On the other hand, and I say this as someone who cares deeply about getting women the right support, the reframe of this as a "metabolic condition" in a conventional medicine context carries risk. Because in conventional medicine right now, having a metabolic condition often means one thing...straight to a GLP-1 agonist.
GLP-1 receptor agonists like semaglutide (Ozempic, Wegovy) are already being used off-label in women with PCOS, and I expect that use to accelerate with this name change.
GLP-1s lower blood sugar and support weight loss by suppressing appetite, slowing gastric emptying, and improving insulin sensitivity. These are not a true root cause intervention and they come with significant side effects including nausea, muscle loss, gallbladder issues, cancer risk, vision changes and more. We often see significant regain as soon as these medications are stopped, which is also concerning. When I have a client who wants to go on a GLP-1, I will absolutely work with them where they are starting from, but I often ask them if they will give me 12 weeks to see if we can turn the ship around first using a ketogenic diet approach. More often than not, it works.
Symptoms of PMOS
Symptoms can vary widely from person to person, and you do not have to check every box to have PMOS. Since it is a syndrome, diagnosis is based on a collection of symptoms, not on a single diagnostic test. This is one of the reasons it goes undiagnosed for so long.
- Irregular, absent, or unpredictable menstrual cycles one of the most common presenting symptoms, driven by anovulation
- Excess hair growth (hirsutism) typically on the face, chin, chest, or abdomen, reflecting elevated androgens
- Hair thinning or loss at the scalp androgenic alopecia that is frequently mistaken for stress-related shedding
- Acne, especially along the jawline and chin a hallmark sign of androgen excess that does not respond well to topical treatments alone
- Weight gain or difficulty losing weight particularly around the midsection, driven by insulin resistance
- Fatigue and energy crashes often tied to blood sugar dysregulation and cortisol patterns
- Brain fog a downstream effect of insulin resistance and inflammation
- Mood changes, anxiety, or depression hormonal imbalance and HPA axis dysregulation have a direct impact on neurotransmitter function and mood
- Skin tags or darkening of the skin (acanthosis nigricans) particularly in skin folds or around the neck area, a visible marker of insulin resistance
- Difficulty conceiving ovulatory dysfunction is one of the primary drivers of PMOS-related infertility
- Low libido can reflect both hormonal imbalance and adrenal fatigue
It is also worth noting that PMOS does not always look the way people expect. The "lean PMOS" phenotype is real and frequently missed. Women who are at a normal or low body weight can have significant insulin resistance, androgen excess, and hormonal disruption without the weight gain that providers often look for. If you have been told you "don't look like you have PCOS" or that your labs are normal, it may be worth pushing for a more complete workup using the markers outlined below.
My Approach as a Functional Medicine RD, And Why It Has Not Changed with the New Name
For me, this name change validates how I have always treated this condition, as one that is primarily metabolic.
The root causes I include in my approach:
- Insulin resistance and blood sugar dysregulation
- Androgen excess driven by hyperinsulinemia
- HPA axis dysregulation and elevated cortisol patterns
- Vitamin D deficiency and other nutrient depletion patterns
- Gut microbiome imbalance
- Systemic inflammation
- Estrogen dominance and progesterone insufficiency
- Thyroid dysfunction as a compounding driver
None of that changes because the name did. But I hope the name change means more women get the right workup earlier and that more providers stop treating this as a gynecological inconvenience and start treating it as the complex metabolic condition it is.
Labs I Recommend for a Complete PMOS Workup
Here is what I look at with my clients:
- Fasting insulin optimal is under 5 µIU/mL; anything over 10 is a red flag even if glucose looks normal
- HbA1c optimal under 5.4%; tells us about average blood sugar over 3 months
- Vitamin D (25-OH) optimal 60–1000 ng/mL; deficiency is seen in 67–85% of women with PMOS
- DHEA-S reflects adrenal androgen contribution; important for understanding the source of androgen excess
- Free and total testosterone free testosterone is most clinically useful for assessing hyperandrogenism
- SHBG (sex hormone binding globulin) low SHBG means more free androgens in circulation; insulin suppresses SHBG production
- Estradiol and progesterone assess cycle day-appropriate levels; estrogen should be on day 3, progesterone drawn around day 19-21 confirms whether ovulation occurred
- LH and FSH an LH:FSH ratio greater than 2:1 supports a PMOS diagnosis, this should be drawn on day 3
- Full thyroid panel TSH, free T3, free T4; thyroid dysfunction compounds the metabolic picture and is frequently missed
These are all included in my Fertility Foundations Panel if you already know this all sounds like you and want to finally get some answers!
For a deeper look at hormone metabolism, estrogen pathways, cortisol patterns, and adrenal function, I recommend the DUTCH Plus Panel (Dried Urine Test for Comprehensive Hormones). It gives a more complete picture than serum labs alone and is particularly valuable when adrenal androgens or cortisol dysregulation appear to be significant drivers.
Dietary Approach: Why I Go Low Carb
Because insulin resistance is the central driver in the majority of PMOS cases, reducing carbohydrate load is the most powerful dietary lever available. When insulin stays chronically elevated, it signals the ovaries to produce more androgens, suppresses SHBG, disrupts the LH/FSH ratio, and prevents ovulation.
A study from Duke University found that a low-carbohydrate ketogenic diet led to a 54% reduction in fasting insulin, a 22% reduction in free testosterone, and a 36% reduction in LH/FSH ratio over 24 weeks. Two participants became pregnant despite previous infertility. More recent research confirms that a ketogenic approach can restore menstrual cycle regularity, even independent of significant weight loss.
My general framework:
- Use a therapeutic ketogenic diet (typically I start with 30-45 grams carbs) for those with significant insulin resistance, fertility goals, or elevated androgens
- Prioritize protein and fat at every meal to blunt the blood sugar response
- Avoid snacking between meals to allow insulin to return to baseline
- Front-load calories earlier in the day when insulin sensitivity is highest, consider fasting the last meal of the day to accelerate results
- Eliminate the obvious glucose drivers: refined carbohydrates, sweetened beverages, alcohol, high-glycemic fruit, ultraprocessed foods
- Potentially use a CGM (continuous glucose monitor) to track blood sugar trends
Functional Food Goals for PMOS
- Fatty fish (salmon, herring, anchovies, sardines, mackerel) best dietary source of EPA and DHA omega-3s, which reduce systemic inflammation, improve insulin sensitivity, and help lower androgen levels
- Cinnamon contains chromium and bioactive compounds that improve insulin receptor sensitivity and blunt post-meal blood sugar spikes; even small amounts added to food consistently have shown measurable effects on fasting glucose. Look for Ceylon cinnamon!
- Apple cider vinegar the acetic acid slows gastric emptying and improves insulin response to meals; 1–2 tablespoons before a carbohydrate-containing meal is the most studied approach. I recommend taking as a shot.
- Spearmint tea has direct research in PCOS showing it can meaningfully reduce free testosterone levels with regular consumption; 2 cups daily is the studied dose
- Flaxseed the lignans in flax bind to androgen receptors and support estrogen clearance through the gut. Add to smoothies or yogurt.
- Walnuts a head-to-head study against almonds found walnuts specifically reduced androgen levels while almonds increased SHBG; the ALA omega-3s and polyphenols appear to be the mechanism
Supplement Protocol
The following supplements have the strongest evidence base for PMOS. Doses are general starting points based on the research but you should always personalize based on labs and presentation, and work with a practitioner who can guide your specific protocol. Note this general information only and is not medical advice.
You can view all of the supplements I recommend for PMOS in my Fullscript Dispensary.
Myo-Inositol
Dose: 2g myo-inositol twice daily (4g total), ideally with 200mcg folate
Inositol is one of the most well-researched and well-tolerated supplements for PMOS. Myo-inositol acts as an insulin sensitizer and secondary messenger in the insulin signaling pathway, improving glucose uptake and reducing the hyperinsulinemia that drives androgen excess.
A meta-analysis of 9 randomized controlled trials found significant reductions in fasting insulin and HOMA-IR. In a 12-week RCT in women with PCOS, 2g twice daily significantly reduced LH, testosterone, and insulin while improving insulin sensitivity, with around 68% of participants restoring menstrual cycle regularity.
While I used to dose this all at night, I actually recommend spreading out and taking 2 grams first thing in the morning (30 mins before a meal) and 2 grams before bed to best mimic what we see in the research.
Berberine
Dose: 500mg 2–3x daily with meals; the phytosome form is preferred for absorption and tolerability
Berberine activates AMPK, the same cellular pathway targeted by metformin, making it one of the most clinically meaningful insulin sensitizers available. It also has a GLP-1 like impact, so we could call it Nature's Metformin AND Nature's Ozempic!
A 2020 review of over 1,000 women found that berberine was significantly more effective at improving insulin sensitivity than placebo, with effects comparable to metformin. It also increases SHBG, reduces LDL cholesterol, and supports menstrual cycle regularity.
The phytosome form has superior bioavailability and far fewer GI side effects than standard berberine.
Vitamin D3 + K2
Dose: Personalized to labs; general starting range is 2,000–5,000 IU D3 daily, paired with K2 for best absorption
As I noted above, Vitamin D deficiency affects an estimated 67–85% of women with PMOS. Vitamin D receptors are present in ovarian tissue and play a direct role in follicular development, insulin signaling, and SHBG production. Deficiency is associated with worsened insulin resistance, elevated androgens, reduced SHBG, and disrupted menstrual cycles.
An RCT found that vitamin D supplementation significantly improved fasting insulin and SHBG in women with PCOS. Test before you supplement, the optimal functional range is 60–100 ng/mL. Always be sure to pair D3 with K2 to support proper calcium utilization.
Magnesium Glycinate or Bisglycinate
Dose: 200–400mg daily, taken before bed
Magnesium plays a role in over 300 enzymatic reactions including those involved in insulin receptor signaling and glucose metabolism. Higher magnesium status is associated with lower blood sugar, reduced insulin resistance, and lower testosterone levels in women with PMOS.
Magnesium also supports sleep quality, HPA axis regulation, and cortisol balance, all of which are relevant to the PMOS metabolic picture.
The glycinate or bisglycinate form is best absorbed and gentlest on the GI tract. Taking this as an evening dose supports nervous system and sleep quality.
Omega-3 Fatty Acids (EPA + DHA)
Dose: 2–3g combined EPA+DHA daily with food
Omega-3s address two major drivers in PMOS: systemic inflammation and insulin resistance.
A review of nine studies found omega-3 supplementation improved insulin resistance and cholesterol in women with PCOS. An 8-week RCT found that omega-3 supplementation significantly improved triglycerides, total cholesterol, fasting insulin, and SHBG. Women with PMOS are at elevated cardiovascular risk, so the cardiometabolic benefits here are meaningful beyond just hormone balance.
Consider Ashwagandha (KSM-66 or Sensoril extract) if stress is a major factor
Dose: 300–600mg daily of a standardized extract
Ashwagandha is most relevant for the cortisol-dominant PMOS phenotype, these are women who present with elevated DHEA-S, adrenal-driven androgen excess, high stress load, disrupted sleep, and HPA axis dysregulation.
As a clinically studied adaptogen, ashwagandha has been shown to reduce cortisol, lower perceived stress, and support thyroid function. Because chronic cortisol elevation drives adrenal androgen production and suppresses SHBG, normalizing the cortisol pattern can meaningfully support androgen balance.
The Bottom Line
PCOS is now PMOS. The name is better. The framing is more accurate. And for women who have spent years being dismissed, misdiagnosed, or handed a birth control pill and sent home, I hope this opens a door to a more complete conversation about what is actually going on in their bodies. But a name change alone does not guarantee a better standard of care. If the conventional medicine response to "metabolic condition" is simply a GLP-1 prescription, we will have changed the label without changing the outcome. Real treatment for PMOS starts with a real workup, a real dietary intervention, targeted supplementation, and a provider who is willing to listen and look at the whole picture. If you want to work with me, you can learn more here.
References
- Teede HJ et al. Polyendocrine metabolic ovarian syndrome, the new name for polycystic ovary syndrome: a multistep global consensus process. The Lancet. 2026. doi:10.1016/S0140-6736(26)00717-8
- Mavropoulos JC et al. The effects of a low-carbohydrate, ketogenic diet on the polycystic ovary syndrome: a pilot study. Nutrition & Metabolism. 2005. PMC1334192
- Long C et al. A ketogenic diet followed by gradual carbohydrate reintroduction restores menstrual cycles in women with PCOS with oligomenorrhea. Nutrients. 2024. PMID: 39728472
- Unfer V et al. Myo-inositol effects in women with PCOS: a meta-analysis of randomized controlled trials. Endocrine Connections. 2017. PMC5655679
- Pkhaladze L et al. Myo-inositol for insulin resistance, metabolic syndrome, PCOS and gestational diabetes. 2022. PMC8896029
- Petrangolini G et al. Berberine phospholipid is an effective insulin sensitizer and improves metabolic and hormonal disorders in women with PCOS. Nutrients. 2021. PMC8538182
- Maktabi M et al. Effects of vitamin D and omega-3 on metabolic profile in women with PCOS: an RCT. 2023. PMC10505700
- Kamenov Z, Gateva A. Inositols in PCOS. Molecules. 2020. PMC7729761