The short answer
Studies suggest the Mediterranean diet—rich in vegetables, legumes, whole grains, fish, and olive oil—can improve insulin sensitivity, lower androgen levels, and reduce inflammation in people with PCOS, though it is not a standalone cure.
What the research shows
Multiple clinical studies report that following a Mediterranean-style diet for 12–24 weeks is associated with reductions in fasting insulin, testosterone, and inflammatory markers such as CRP in women with PCOS. It is one of the better-studied dietary patterns in this population.
How to adapt it for PCOS
Emphasise oily fish at least twice a week, legumes three or more times weekly, colourful vegetables at every meal, and olive oil as the primary fat. Limit processed meat, refined grains, and added sugar. Combine with regular physical activity for synergistic benefits.
Quick follow-up questions
Is the Mediterranean diet better than a low-carb diet for PCOS?
Both patterns have evidence for improving insulin sensitivity in PCOS. The Mediterranean diet may be easier to sustain long-term; low-carb can work well for some individuals. A registered dietitian can help you choose based on your labs and preferences.