PCOS and Diet: What Actually Helps?

Polycystic ovary syndrome (PCOS) affects approximately 1 in 10 Canadian women of reproductive age. While there is no cure, dietary modifications are a cornerstone of management and can significantly improve symptoms. PCOS is associated with insulin resistance in up to 70% of affected individuals. This connection makes blood sugar management a key dietary focus. Evidence-based dietary approaches for PCOS include choosing low-glycemic index (GI) foods (whole grains, legumes, non-starchy vegetables) to help stabilize blood sugar, increasing fibre intake to improve satiety and insulin sensitivity, including anti-inflammatory foods (fatty fish, leafy greens, berries, nuts), limiting refined carbohydrates and added sugars, and ensuring adequate protein at each meal. Research does not support any single \"PCOS diet.\" Instead, the best approach is one that reduces insulin resistance, supports a healthy weight (even a 5 to 10% weight loss can improve symptoms), and is sustainable long-term. Supplements sometimes discussed in the context of PCOS include inositol, vitamin D, and omega-3 fatty acids. However, evidence varies, and supplementation should be discussed with your healthcare provider. A registered dietitian with experience in PCOS can help create a personalized eating plan. Telehealth nutrition consultations are available. *This article is for informational purposes only.*

This article is for informational purposes only and does not constitute medical advice. Content reviewed by licensed Canadian physicians. Last updated February 2026.