Why diet matters in PCOS
PCOS is closely linked to insulin resistance — where your body's cells don't respond well to insulin, leading to higher blood sugar and insulin levels. This can worsen PCOS symptoms, including weight gain, irregular cycles, and acne.
Because insulin plays such a central role, dietary changes that improve insulin sensitivity can have a real impact on PCOS symptoms for many women.
What the evidence supports
Research suggests that a diet rich in whole foods, fibre, lean protein, and healthy fats — similar to a Mediterranean diet — can help improve insulin sensitivity and PCOS symptoms. There's also some evidence for low-GI (glycaemic index) eating patterns.
Importantly, there's no single 'PCOS diet' that works for everyone. Restrictive diets are difficult to sustain and can lead to disordered eating. A sustainable, balanced approach is more effective long-term than cutting out entire food groups.
Beyond diet
Diet is just one piece of the puzzle. Regular exercise — particularly a combination of cardio and strength training — is one of the most effective ways to improve insulin sensitivity. Even modest weight loss (5–10% of body weight) can significantly improve symptoms.
Your GP can also discuss medical treatments — such as the pill for cycle regulation and skin symptoms, or metformin for insulin resistance — that may work alongside lifestyle changes. It's not a choice between diet and medication; they work best together.
Related condition
PCOS →References & sources
This content is general information and not a substitute for individual medical advice. Please consult a GP for your personal situation.
Ready to speak with a GP?
Book a private telehealth consult with an AHPRA-registered Australian GP.