"Anti-inflammatory diet" is one of the most searched phrases around PCOS, and one of the least defined. It is sold as a supplement stack, as a turmeric latte, as a reason to cut gluten and dairy, and as a rebranding of the Mediterranean diet. Some of that has evidence behind it. Most of it has a marketing budget. This page tries to separate the two.
It sits under the PCOS diet guide, and the conclusion is the one that page reaches too: the eating pattern with evidence behind it for PCOS is the ordinary healthy one, and "anti-inflammatory" done well is a name for the same thing.
PCOS and low-grade inflammation
The idea has a real basis. The US National Institute of Child Health and Human Development describes PCOS as a set of symptoms related to a hormonal imbalance whose effects can reach metabolic, cardiovascular, inflammatory, reproductive and other aspects of health. "Low-grade inflammation" is the research term for a modest, persistent activation of the immune system, and it appears in the PCOS literature alongside insulin resistance and higher androgens.
What is worth knowing is how little the clinical guidance builds on it. The 2023 international guideline — the most thorough review of PCOS evidence available — organises its recommendations around insulin resistance, glucose, lipids, blood pressure, weight, sleep, mental health and fertility. Its diet section does not mention inflammation at all, and it recommends no anti-inflammatory diet, test, or supplement. That is not because inflammation is imaginary. It is because there is not yet evidence good enough to turn it into advice that differs from the advice the guideline already gives.
So the honest position is: inflammation is part of the picture in PCOS, and nothing you can buy has been shown to treat it in a way that ordinary healthy eating does not.
What "anti-inflammatory" means in practice
Strip the label off and look at what the anti-inflammatory diets actually contain. Vegetables and fruit in quantity. Wholegrains rather than refined ones. Pulses. Oily fish. Olive oil, nuts and seeds. Less red and processed meat, less saturated fat, less free sugar, fewer packaged foods. Sometimes herbs and spices; sometimes a rule against one food group or another.
Now put that next to the NHS's eight tips for healthy eating: base meals on higher-fibre, wholegrain starchy foods; eat at least five portions of fruit and vegetables a day; eat more fish, including a portion of oily fish a week; cut down on saturated fat and sugar; eat less salt. The two lists are the same list. The anti-inflammatory diet, in its sensible form, is the healthy-eating pattern with a more persuasive name. And that pattern is exactly what the guideline recommends for PCOS: any diet composition consistent with population healthy-eating guidance, kept sustainable and tailored to you.
That is good news, because it means you do not need a separate plan. It also means the name adds nothing you were not already getting.
The foods with evidence
These are the foods that appear on anti-inflammatory lists and that public health guidance supports — for general and cardiometabolic health, which is where the evidence actually is. None of the sources this page cites claims they lower inflammation in PCOS specifically, and neither does this page.
- Oily fish — salmon, mackerel, sardines, trout, herring. The NHS asks for at least two portions of fish a week, one of them oily, and notes that oily fish are high in omega-3 fats, which may help prevent heart disease.
- Vegetables and fruit — at least five portions a day, fresh, frozen, tinned or dried. The NHS puts these at the centre of a healthy diet for their fibre, vitamins and minerals.
- Wholegrains and pulses — oats, wholegrain bread, brown rice, beans, lentils, chickpeas. Higher-fibre starchy foods that keep you fuller for longer, in the NHS's words; the pulses carry protein too.
- Unsaturated fats — olive and rapeseed oil, nuts, seeds, avocado. The NHS asks for these in place of saturated fat, in small amounts.
- Less saturated fat, sugar and salt — fewer pastries, biscuits, processed meats and sugary drinks. The NHS gives daily limits for all three.
Everything on that list is also on the plate in the 7-day PCOS meal plan. You do not need to buy anything new to eat this way.
The foods with marketing
Then there is the other list. Turmeric and curcumin capsules. "Detox" and "hormone-balancing" teas. Green powders and gummies. Apple cider vinegar. Celery juice. Cutting gluten or dairy without a diagnosed intolerance. Supplement stacks sold as anti-inflammatory bundles.
The sources on this page do not mention any of them, and that is the point: the guideline reviewed the evidence on lifestyle and supplements for PCOS and found nothing on which to recommend them. The one supplement it does address, inositol, is not sold as anti-inflammatory and gets a cautious verdict — could be considered, limited harm, limited clinical benefit. On gluten and dairy specifically, the guideline's line that no diet composition beats another, and its warning against unduly restrictive diets, cut against removing whole food groups on the strength of a label. Dairy, in the NHS's guidance, is a source of protein and calcium, not a food to remove.
A spice in your cooking is a spice in your cooking, and there is nothing wrong with turmeric in a curry. The trouble starts when it is a capsule with a promise on the label. If a product claims to reduce inflammation, balance hormones or reverse PCOS, the claim is the reason to be sceptical. The guideline asks anyone taking complementary therapies to tell their doctor, which is a good rule for the whole of this list.
A week of it
Because the pattern is the ordinary healthy one, a week of it looks like an ordinary healthy week rather than a programme:
- Oily fish twice — one dinner, one lunch on toast.
- Vegetables at lunch and dinner, fruit at breakfast and as a snack, most days.
- Oats or wholegrain bread at breakfast, pulses in two or three main meals, brown rice or wholewheat pasta where rice or pasta appears.
- Olive oil for cooking and dressing; nuts and seeds where a snack is needed.
- Sugary drinks, pastries and packaged snacks kept for occasions rather than the daily routine, as the foods-to-limit page in this series describes.
- Nothing eliminated, nothing bought from a supplement aisle.
The 7-day PCOS meal plan is that week written out meal by meal.
In the app: PCOS Pal's food score rates each scanned food on its protein share, carbohydrate share and glycaemic index where known — the insulin side of this page. It does not measure inflammation; nothing can from a barcode. In the recipe library, recipes whose ingredients fit the pattern above carry an Anti-Inflammatory tag.
Where it overlaps with the insulin advice
Almost entirely. The foods the anti-inflammatory pattern favours — fibre, pulses, wholegrains, protein, unsaturated fat — are the foods that slow the rise in blood sugar after a meal, and the foods it limits — free sugars, refined starch, packaged snacks — are the ones that speed it up. The guideline's advice for PCOS is organised around insulin because that is where the evidence is; the insulin resistance and PCOS page explains why. Eat for insulin, in the way the guideline and the NHS describe, and you are eating the anti-inflammatory diet whether or not you call it that.
If you have been told PCOS is inflammatory and have wondered whether that changes what you should eat, the answer from the evidence is: not yet, and not in a way that a product can sell you. The pattern is the same. The name is optional.
Sources
- Recommendations from the 2023 International Evidence-based Guideline for the Assessment and Management of PCOS (Human Reproduction, full text at PMC)
- NHS — 8 tips for healthy eating
- NICHD — Polycystic ovary syndrome (PCOS)
This article is for education. It is not medical advice, diagnosis or treatment — talk to a clinician about your own care.
More in this series
- PCOS diet: what to eat, and why it works — What the evidence says about eating with PCOS: insulin, the pattern that helps, the foods worth limiting, and why no rigid plan is required.
- Foods to limit with PCOS, and why banning them backfires — The foods worth eating less often with PCOS, the evidence for each, and why "limit" beats "never" for a diet you can keep.
- Insulin resistance and PCOS, explained — What insulin resistance is, why it is so common in PCOS, how it is actually tested, and what food, movement, sleep and medication each do about it.
- Low-GI foods for PCOS: a practical list — What the glycaemic index does and does not tell you, which carbohydrates rank low, how protein and fat change the picture, and where GI stops helping.
- PCOS breakfast ideas that hold you until lunch — Why breakfast is where PCOS eating plans break, the protein-fibre-fat template that fixes it, ten breakfasts that use it, and what to do about coffee.
- A 7-day PCOS meal plan you can actually keep — Seven days of ordinary meals built on the pattern the evidence supports, with a shopping list and swaps, and no food group cut out.