All diets / PCOS eating

Drawing for PCOS eating: the healthen mark with the word PCOS, dal, olive oil, chicken, spinach, pear, seeds and white fish.
What you eat on PCOS eating: dal, olive oil, chicken, spinach and pear.

Eating with PCOS: it's an insulin problem as much as a hormone one. Food helps with that part.

PCOS is common, under-diagnosed and drowning in bad advice. No diet cures it. Some ways of eating clearly make the insulin side easier, and that's worth knowing.

The short version

What it is
Eating that keeps insulin calmer: fewer fast carbs, more fibre and protein, steady meals, and modest weight loss if you carry extra weight.
Good for
Insulin resistance, weight, and some of the hormone markers that drive PCOS symptoms.
Bad at
Curing PCOS. Also bad at being "the one PCOS diet": there isn't one.
Evidence
Low to moderate. Lots of small studies, few long ones.
Our take
Worth doing, with your doctor in the loop. Ignore anyone who sells it as a cure.

What a PCOS diet actually is

Polycystic ovary syndrome (PCOS) affects roughly 8–13% of people with ovaries of reproductive age.1 It shows up as irregular periods, higher levels of male-type hormones (acne, extra hair, hair loss on the head), and often problems getting pregnant. Many people with PCOS also have insulin resistance, whatever their weight.

Fun fact for the name nerds: experts have proposed renaming it polyendocrine metabolic ovarian syndrome (PMOS), partly because the "cysts" aren't really cysts and the metabolic side was being ignored.5 The debate is ongoing. Your diagnosis doesn't change.

A "PCOS diet" is any way of eating that targets the metabolic part: steadier blood sugar, less insulin, and, where it applies, some weight loss. The 2023 international guideline is refreshingly honest about it: it doesn't back any one diet over another and recommends healthy eating you can actually stick to.2

How it works in your body

Insulin's job is to move sugar out of your blood. With insulin resistance, your body needs more of it to do the same job. In PCOS, high insulin levels push the ovaries to make more androgens (the male-type hormones), which drive many of the symptoms.

Food that releases sugar slowly (low glycaemic index, or GI) asks for less insulin at once. Protein, fibre and fat in the same meal slow things down further. Losing some weight, if you have weight to lose, makes your body more sensitive to insulin. That's the whole logic: less insulin pressure, fewer androgens, fewer symptoms. It doesn't always play out that neatly, but that's the idea.

What does that look like on a normal day? Breakfast of eggs or Greek yoghurt with berries instead of toast with jam. Lunch built on lentils or beans with vegetables and some chicken or fish. Dinner with a small portion of brown rice or potatoes, eaten after the vegetables and protein. Water instead of juice. No snacking every two hours, which keeps insulin up all day.

Movement belongs in the same package. Muscles soak up blood sugar when you use them, and the guideline recommends regular physical activity for everyone with PCOS, whatever their weight.2 A walk after dinner counts.

What you eat, what you don't

Eat

  • Lentils, beans, chickpeas
  • Vegetables at every meal, eaten first
  • Protein at every meal: fish, eggs, chicken, tofu, Greek yoghurt
  • Wholegrains: oats, rye, barley, brown rice, in small portions
  • Berries, apples, pears, citrus
  • Olive oil, nuts and seeds

Forget it

  • Soft drinks, juice, sweetened coffee drinks
  • White bread, pastries, sweet cereals
  • Sweets and biscuits between meals
  • Big plates of white rice or pasta on their own
  • "PCOS detox" teas and hormone gummies
  • Crash diets that make you binge three days later

Making it work where you live

The principles are the same everywhere: vegetables and protein on the plate, slower carbs in smaller portions, fewer sweet drinks. What changes is the menu.

In Singapore: ask for less rice or brown rice where the stall offers it, and add an extra vegetable or tofu at the economy rice stall. Fish soup, yong tau foo (soup, not the sweet sauce) and thunder tea rice are steady choices. The traps are the drinks: bubble tea, kopi with condensed milk and sweetened teh can add a lot of sugar. Ask for kosong (no sugar) or siew dai (less sugar).

In Austria, Germany and Switzerland: dense wholegrain or rye bread instead of white Semmeln, Topfen or eggs at breakfast instead of jam, and a lentil or bean dish at lunch. Watch the sweet bakery stops and the Apfelstrudel with coffee every afternoon. And Kaiserschmarrn is a dessert, not lunch, however big the portion.

Alcohol with PCOS

OK, now and then

  • One glass of dry red or white wine with food
  • A spirit with soda water and lime
  • Sparkling wine labelled brut nature or extra brut

Spikes and regrets

  • Cocktails, alcopops, liqueurs, sweet wine
  • Anything mixed with juice, cola or tonic
  • Beer in large amounts
  • Drinking on an empty stomach

50 Club: not on this one. If you're trying to get pregnant, the safe amount is zero.

Alcohol is extra calories with no protein or fibre, and it makes the late-night snack a lot more likely. If you take metformin, ask your doctor about drinking. All the details are in our alcohol guide.

What it's good for, with proof

Weight and hormone markers

A Cochrane review of lifestyle programmes (diet, exercise or both) in PCOS found they may lower weight by about 1.7 kg and improve the free androgen index, a measure of active male-type hormones.1 The evidence was low quality, and no trial measured live births. Modest, real, under-studied. That sums up most PCOS nutrition research.

Low GI and insulin

In a 12-month trial of 96 people with PCOS, a low-GI diet improved insulin sensitivity more than a conventional healthy diet with the same nutrients, and more people on low GI got more regular periods: 95% against 63%.3 But half the participants dropped out, so take it as a promising lead, not proof.

Vegetables and protein first

Eating vegetables and protein before carbs flattened the sugar and insulin rise after a meal in a small study of people with type 2 diabetes.6 Not a PCOS study, but it's free, harmless and targets the exact problem. Our glucose-spike techniques article has the details.

The uncomfortable truth

"You have to cut out dairy, gluten and sugar forever to manage PCOS." No good evidence for cutting dairy or gluten in PCOS unless you have a separate reason (an allergy, coeliac disease). The international guideline doesn't recommend any specific restrictive diet.2 Cutting added sugar and fast carbs: yes. Cutting whole food groups out of fear: no.

"PCOS is caused by weight." No. Plenty of slim people have PCOS, and plenty have insulin resistance too. Extra weight can make symptoms worse, which is why losing some helps those who carry it. It's not a cause, and it's not a fault.

The risks

Allergies: watch the staples

StapleAllergen (EU list of 14)7Swap
Oats, rye, barleyCereals containing glutenBuckwheat, quinoa, brown rice
Greek yoghurt, cheeseMilkSoy yoghurt, tofu
EggsEggsTofu, fish, chicken
Salmon, sardinesFishChicken, eggs, chia and flax
Tofu, edamameSoyLentils, chickpeas
Almonds, walnutsTree nutsPumpkin and sunflower seeds

Don't do a PCOS diet on your own if you…

  • haven't been diagnosed by a doctor
  • are pregnant or trying to get pregnant
  • take metformin, insulin or other diabetes medication
  • have ever had an eating disorder
  • are under 18

Healthen me asks about all of these and gives you a different plan if any apply.

How we use PCOS eating in your plan

PCOS is on our medical list. If you tell us you have it, we screen you and point you to your doctor or a dietitian before anything else. Then we offer a gentle plan they can look over.

That plan is built around steady blood sugar: vegetables and protein first, slow carbs from the low-GI list, a proper protein portion at each meal, and no crash dieting. Fasting stays mild and only with your doctor's okay, especially if you take medication or are trying to conceive.

This article is general information, not medical advice. If you have a medical condition or take medication, talk to your doctor before changing how you eat.

Sources

  1. Lim SS et al. Lifestyle changes in women with polycystic ovary syndrome. Cochrane Database of Systematic Reviews 2019;3:CD007506. doi.org/10.1002/14651858.CD007506.pub4
  2. Teede HJ et al. Recommendations from the 2023 international evidence-based guideline for the assessment and management of polycystic ovary syndrome. European Journal of Endocrinology 2023;189(2):G43–G64. doi.org/10.1093/ejendo/lvad096
  3. Marsh KA et al. Effect of a low glycemic index compared with a conventional healthy diet on polycystic ovary syndrome. American Journal of Clinical Nutrition 2010;92(1):83–92. doi.org/10.3945/ajcn.2010.29261
  4. Aroda VR et al. Long-term metformin use and vitamin B12 deficiency in the Diabetes Prevention Program Outcomes Study. Journal of Clinical Endocrinology & Metabolism 2016;101(4):1754–1761. doi.org/10.1210/jc.2015-3754
  5. Aleksejeva-Zagura E et al. The PCOS-to-PMOS shift in the broader history of nomenclature changes and its uncertain impact on clinical practice. Acta Obstetricia et Gynecologica Scandinavica 2026 (online ahead of print). doi.org/10.1111/aogs.70380
  6. Shukla AP et al. Food order has a significant impact on postprandial glucose and insulin levels. Diabetes Care 2015;38(7):e98–e99. doi.org/10.2337/dc15-0429
  7. Regulation (EU) No 1169/2011 on food information to consumers, Annex II (the 14 allergens). eur-lex.europa.eu/eli/reg/2011/1169/oj