What Should I Eat If I Have PCOS?
Quick answer: A low-GI, anti-inflammatory diet helps manage PCOS by reducing insulin resistance, lowering androgens, and supporting hormone balance. Avoid refined carbs, sugar, and dairy in excess.
What to Eat
Low-GI carbohydrates (sweet potato, oats, quinoa, legumes)
Reduce insulin spikes — insulin resistance is present in 70% of PCOS cases and drives androgen overproduction.
Lean protein (chicken, fish, eggs, tofu)
Protein doesn't spike insulin; keeps blood sugar stable and supports healthy hormone production.
Fatty fish (salmon, sardines)
Omega-3s reduce testosterone levels, improve insulin sensitivity, and lower inflammation in PCOS.
Dark leafy greens (spinach, kale)
Low calorie, high micronutrients — magnesium (often deficient in PCOS) helps insulin signalling.
Berries and low-sugar fruits
Lower fructose load than tropical fruits; antioxidants reduce oxidative stress elevated in PCOS.
Nuts and seeds (flaxseed is especially beneficial)
Flaxseed lignans reduce free testosterone; nuts provide anti-inflammatory fats and selenium.
Cinnamon
Improves insulin sensitivity and may regulate menstrual cycles in PCOS — evidence from multiple clinical trials.
Fermented foods (yogurt, kimchi, kefir)
Gut microbiome diversity is reduced in PCOS; probiotics improve insulin sensitivity and reduce inflammation.
What to Avoid
Refined carbohydrates and sugary foods
Cause insulin spikes that stimulate ovarian androgen production — the central mechanism worsening PCOS.
Sugary drinks and fruit juices
Fructose impairs insulin signalling; liquid sugar hits bloodstream faster than solid food.
Dairy (particularly full-fat)
IGF-1 in dairy can raise androgen levels; lactose also increases insulin; evidence is moderate but dairy reduction often helps symptoms.
Red and processed meat in excess
Associated with higher inflammation and worse insulin resistance in PCOS studies.
Soy in large amounts
Phytoestrogens in soy may disrupt hormone balance — moderate amounts are likely fine, but large daily quantities are debated.
Alcohol
Liver metabolises oestrogen — alcohol impairs this, worsening oestrogen dominance sometimes present in PCOS.
Hydration
Stay well hydrated with water and herbal teas. Spearmint tea (2 cups daily) has clinical evidence for reducing androgen levels in PCOS. Avoid sugary drinks and alcohol completely.
Tips
- •The PCOS diet is fundamentally about insulin resistance — low-GI eating is the primary lever.
- •Inositol (especially myo-inositol) supplementation has strong evidence for improving insulin sensitivity and restoring ovulation in PCOS.
- •Exercise is as important as diet — resistance training specifically improves insulin sensitivity and lowers testosterone.
- •Weight loss of 5–10% of body weight restores ovulation in many PCOS cases.
- •Get tested for vitamin D deficiency — very common in PCOS and supplementation improves outcomes.