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By Amy Suzanne Upchurch, Founder + CEO of Pink Stork, Certified Health Coach, INHC
Insulin resistance is at the heart of PMOS for the majority of women who have it. When cells become less responsive to insulin, the body compensates by producing more. This increased insulin then signals the ovaries to produce more androgens than they should and are what cause many of the most visible and bothersome symptoms of the condition: irregular cycles, acne, excessive hair growth, difficulty maintaining a stable weight, and energy instability. Understanding this mechanism is one of the most straightforward things a woman with PMOS can do, because it explains why the condition affects so many parts of the body at once.
What actually is insulin resistance?
Insulin is a hormone produced by the pancreas that helps cells absorb glucose from the bloodstream for energy. In a body with healthy insulin sensitivity, cells readily respond to the insulin signal and the pancreas produces only as much as needed. In a body with insulin resistance, cells respond slowly and the pancreas compensates by producing more insulin to achieve the same effect.
THE Mayo Clinic describes insulin resistance as a condition in which cells in your muscles, fat, and liver don’t respond well to insulin and can’t easily take up glucose from the blood. Over time, if the pancreas cannot keep up with the demand, blood sugar levels begin to rise. For women with PMOS, the increased insulin itself, before blood sugar becomes dysregulated, already creates hormonal effects throughout the body.
How insulin resistance causes PMOS symptoms
The connection between increased insulin and androgen production is the central mechanism of PMOS for most women. High insulin levels signal the ovaries and adrenal glands to produce more androgens, including testosterone. In women, testosterone at elevated levels causes acne, excessive facial and body hair, thinning scalp hair, and impaired ovulation.
Disrupted ovulation means that the follicles that begin to develop do not complete the maturation process. They arrest in an intermediate stage. Multiple sessile follicles on ultrasound are what historically gave rise to the term “polycystic,” even though these follicles are not cysts in any pathological sense. They are the downstream signature of hormonal disruption, not its cause.
THE American Journal of Managed Carein covering the PMOS consensus, noted that recognizing the condition as polyendocrine recognizes that multiple interacting hormonal disturbances are involved, including insulin and neuroendocrine hormones, rather than treating it as a single ovarian disorder. This framework opens the door for metabolic interventions to be prioritized alongside or before reproductive management.
“Hormones are not separate from the rest of your system.”
— Dr. Samantha Ess, ND, Naturopathic Physician specializing in hormonal health and fertility
Because insulin resistance in PMOS isn’t just about weight
One of the most persistent misconceptions about PMOS is that insulin resistance is a consequence of being overweight and would resolve with weight loss. Research has consistently shown that this is not true. Insulin resistance in PMOS is present in lean women as well as women who are overweight. It is characteristic of the underlying endocrine condition, not simply a consequence of lifestyle.
According to STAT newsresearchers involved in the renaming process have described insulin resistance as the driver of PMOS for most women who have it. It is the increased insulin that results from this resistance that tricks the ovary into producing too much testosterone, leading to the visible symptoms women experience. This means that addressing insulin sensitivity, through diet, exercise and where appropriate targeted supplementation, is a metabolic intervention with reproductive and hormonal consequences, not just a weight management strategy.
The long-term metabolic risks of untreated PMOS
Because PMOS involves chronic insulin dysregulation and elevated androgen levels, it poses long-term metabolic health risks that extend far beyond reproductive concerns. The Lancet consensus document documents that the condition is associated with increased risks of impaired glucose tolerance, type 2 diabetes, fatty liver disease, hypertension, dyslipidemia, cardiovascular disease and sleep apnea.
These risks do not disappear at menopause. Research shows that the metabolic characteristics of PMOS persist beyond the reproductive years. Women with PMOS reach menopause about two years later on average than women without the condition, according to current research on PMOS and the menopausal transitionbut the underlying metabolic condition persists.
That’s why the PMOS name change isn’t just about reproductive medicine. Naming the condition metabolic creates the clinical mandate for ongoing metabolic monitoring, cardiovascular risk assessment, and comprehensive long-term care that has often been absent in the reproductive-only setting of PCOS.
“Birth control affects the gut. The gut affects hormones. You can just see this cascading effect.”
— Dr. Samantha Ess, ND, Naturopathic Physician specializing in hormonal health and fertility
What the metabolic framework means for understanding your symptoms
For women living with PMOS, understanding insulin resistance as the central driver reframes the symptom picture in a clarifying way. Tiredness after meals is not accidental. It reflects the energy dysregulation that occurs when glucose uptake is inefficient. Skin changes, including acne and skin tags, reflect an increase in androgens that increases insulin. Difficulty maintaining a stable weight despite a reasonable diet reflects the metabolic disorder at the root of the condition. Mood swings and brain fog reflect the neurological effects of both insulin dysregulation and elevated androgens.
None of these symptoms exist in isolation. They are expressions of the same underlying metabolic and endocrine disorder. Understanding this connection doesn’t make the symptoms less difficult to live with, but it does make them more readable and makes the path to dealing with them more coherent.
As Dr. Samantha Ess, ND, observes: “Progesterone is low, so they put me on progesterone. But why is it low? That tells us something is not optimal.” The metabolic framework of PMOS is exactly this kind of thinking applied at a systemic level. The question is not only which symptoms to manage, but what drives them.
What a metabolically informed approach to PMOS looks like
A metabolically informed approach to PMOS begins with direct assessment of insulin sensitivity, not just reproductive hormone panels. This means asking your provider for a fasting glucose, fasting insulin, HOMA-IR, lipid panel, and blood pressure assessment along with any hormone testing. These are the metabolic markers that give the most accurate picture of what is driving the condition.
Lifestyle interventions with the strongest evidence base for improving insulin sensitivity include reducing highly processed foods and added sugars, increasing dietary fiber, regular resistance training, and prioritizing sleep. Each of these have documented effects on insulin sensitivity that translate into subsequent hormonal improvements.
For more on the name change and its wider implications for women’s health, see our guides to what PMOS is and why PCOS has just been renamed, and how the name change will affect diagnosis and treatment.
Frequently asked questions
What is insulin resistance and how does it relate to PMOS?
Insulin resistance means that your cells respond slowly to insulin, so the pancreas produces more to compensate. In PMOS, elevated insulin signals the ovaries to overproduce androgens, which cause irregular cycles, acne, excessive hair growth, and other symptoms. Insulin resistance is the central metabolic mechanism in most women with PMOS.
Can you have PMOS without being overweight?
Yes. Insulin resistance in PMOS is present in lean women as well as women who are overweight. It is characteristic of the underlying endocrine condition, not simply a consequence of body weight. This is one reason why PMOS was so often missed: thin women were often told the condition was unlikely, when in fact it was causing their symptoms regardless of their size.
What tests assess insulin resistance in PMOS?
Fasting glucose, fasting insulin, and HOMA-IR (homeostatic model of insulin resistance assessment) are the most commonly used measures. A lipid panel and blood pressure measurement are also helpful in assessing the broader metabolic picture. Ask your healthcare provider to include them with any hormone testing.
Does insulin resistance in PMOS go away on its own?
Insulin resistance in PMOS is characteristic of the underlying endocrine condition and usually does not resolve without intervention. Lifestyle changes, including dietary adjustments, regular exercise, improved sleep, and stress management, can significantly improve insulin sensitivity over time, and targeted supplementation can support this process in some women. Always work with your healthcare provider on a plan that fits your individual situation.
Does PMOS affect metabolic health after menopause?
Yes. The metabolic features of PMOS, including insulin dysregulation and increased cardiovascular risk, do not resolve at menopause. Research shows that they persist even in the postmenopausal years. This is one reason the renaming of PMOS is important: it creates the clinical mandate for continuous monitoring of metabolism throughout a woman’s life, not just during the reproductive years.
What lifestyle changes most directly address insulin resistance in PMOS?
Reducing highly processed foods and added sugars, increasing dietary fiber and protein, regular resistance training, prioritizing seven to nine hours of sleep, and managing chronic stress are independently documented to improve insulin sensitivity. These interventions work together and reinforce each other. Your healthcare provider can help you determine which changes have the most impact, given your individual starting point.
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