Polycystic ovary syndrome is fundamentally a metabolic condition as much as it is a reproductive one. Insulin resistance sits at the heart of PMOS for the majority of women affected, even those who are not overweight, and understanding this connection is essential for managing the condition effectively over the long term.
Insulin is the hormone produced by the pancreas in response to rising blood glucose. When cells become resistant to insulin’s signaling, the pancreas compensates by producing more of it. Elevated insulin levels then stimulate the ovaries to produce excess androgens, the male-type hormones including testosterone, which drive many of the characteristic symptoms of PMOS: irregular cycles, acne, excess hair growth, and difficulties with ovulation.
For women with PMOS, this creates a cycle that can be difficult to interrupt without the right support. Elevated androgens worsen insulin resistance, and elevated insulin promotes more androgen production. Weight gain, particularly around the abdomen, tends to worsen insulin resistance further, though it is important to emphasise that insulin resistance in PCOS is not caused solely by weight and is not limited to women who are overweight. Women with a lean body type can also experience significant insulin resistance.
The metabolic consequences of untreated insulin resistance in PMOS extend beyond reproductive symptoms. Over time, insulin resistance increases the risk of developing type 2 diabetes, cardiovascular disease, and non-alcoholic fatty liver disease. This makes early identification and management of insulin resistance in PMOS a long-term health priority, not just a fertility concern.
The good news is that insulin sensitivity is modifiable. Nutritional approaches that support stable blood glucose, particularly those that reduce refined carbohydrates and prioritise protein and fibre, can meaningfully improve insulin sensitivity. Regular physical activity, especially resistance training, and building muscle mass is also one of the most effective interventions. For some women, medications may be required alongside lifestyle measures.
At SHE Health, we test thoroughly to understand the metabolic picture in PMOS, not just the reproductive one. Because managing this condition well means understanding what is driving it in the first place.
