If you have been diagnosed with polyendocrine metabolic ovarian syndrome — the condition formerly known as PCOS — there’s a metabolic piece of the puzzle that doctors say is hard to ignore. Insulin resistance shows up in the majority of PMOS cases and helps explain everything from stubborn weight gain to acne, irregular cycles and unwanted hair growth. Understanding the link is the first step toward managing symptoms and protecting long-term health.
A 2025 study published through Scientific Reports observed 200 women with the condition and found insulin resistance in 57.5 percent of participants, calling it “inextricably linked” to their hormonal imbalances. Johns Hopkins puts the range even higher, estimating that 35 percent to 80 percent of people with PMOS experience insulin resistance.
How Insulin Resistance Drives PMOS Symptoms
Insulin resistance is what happens when your body stops responding efficiently to insulin, the hormone that allows your cells to use sugar for energy. According to Cleveland Clinic, “Insulin resistance is one of the root physiological imbalances in most, if not all, cases of PMOS. This happens when your pancreas needs to pump out more and more insulin in response to high blood sugar levels.”
That cascade is what fuels many of the most frustrating PMOS symptoms. “As it would happen, insulin is a fat-storage hormone that concentrates fat in your abdominal region,” Dr. Ula Abed-Alwahab told Cleveland Clinic. “High insulin levels can tell the ovaries to make more testosterone. That’s why some women with PMOS have symptoms of excess androgens, like dark hairs on the face and belly.”
What Is PMOS?
PMOS, or polyendocrine metabolic ovarian syndrome, is the updated name for what was long called PCOS (polycystic ovary syndrome). It is a common hormonal and metabolic condition affecting the ovaries and overall health, and it can lead to irregular periods, increased facial or body hair growth, acne, difficulty becoming pregnant and other symptoms tied to hormone imbalance.
The 2025 Scientific Reports study underscored that insulin resistance appears across every PMOS phenotype researchers examined, even though intensity varied from case to case. When the body struggles to process insulin, it triggers an overproduction of androgens, which leads to symptoms like acne and cycle irregularities. The takeaway: regardless of which “version” of the syndrome someone has, addressing the metabolic root cause is often the most effective starting point.
Why Doctors Say Weight and Blood Sugar Matter for PMOS
Because insulin resistance fuels both weight gain and hormonal disruption, monitoring blood sugar is a meaningful part of PMOS care. Banner Health advises that “some people with PMOS develop insulin resistance, which can lead to type 2 diabetes, weight gain and infertility. Knowing how your blood sugar levels respond to your daily habits and diet can be an important tool in avoiding long-term health problems.”
Melinda Cater, a clinical dietitian at Johns Hopkins’ Sibley Memorial Hospital, describes the chain reaction in plain terms. “Insulin is like a key that opens cells and lets glucose in. Glucose is the fuel our bodies use for energy. In people with insulin resistance, the insulin becomes less effective at conveying glucose into the cells properly. This results in a buildup of glucose in the bloodstream and fat cells, which raises the risk of diabetes and obesity,” she said.
That doesn’t mean every patient will face complications, but for those who do, Cater said reaching and maintaining a healthy weight becomes a primary concern — “and that starts with diet and exercise.”
Diet Strategies That Can Help PMOS and Insulin Resistance
Food is one of the most powerful levers for managing insulin resistance, though the right plan varies from person to person. Dr. Abed-Alwahab suggests starting simple: “There’s a large subset of women with PMOS who will thrive on a low-grain or grain-free food plan – similar to a paleo way of eating. Start with a JERF (Just Eat Real Food) diet consisting of whole, unprocessed, unrefined foods.”
Cater takes a less restrictive approach. “Eliminating carbohydrates is not something I recommend,” she said. “However, choosing carb containing foods that include fiber, such as whole grains, beans and non-starchy vegetables can be helpful because they cause less of a surge in blood sugar compared to more refined options. The goal is to keep blood sugar stable and avoid big dips and spikes. Smaller, more frequent meals may help, and including a protein source with meals and snacks can also be beneficial.”
How PMOS and Insulin Resistance Are Treated
Treatment usually begins with lifestyle, not medication. “We treat it by focusing first on nutrition and exercise,” Christina E. Boots, M.D., a reproductive endocrinologist at the Northwestern Medicine Center for Fertility and Reproductive Medicine Chicago in Illinois, said, per HealthCentral. From there, providers can layer in additional support based on whether a patient’s biggest concerns are fertility, cycle regulation, weight or metabolic risk.
