PCOS and food
PCOS diet plan and weight loss: what the evidence supports
There is no single best PCOS diet plan. A systematic review comparing different diets for PCOS (now also called PMOS by the NHS) found only small differences between them, and that losing weight, if you are carrying extra, improved PCOS symptoms whichever way of eating women used. The plan that works is a balanced one you can keep up, built on regular meals, protein, fibre and plenty of plants, alongside regular exercise.
Key facts
A systematic review of diets for PCOS found subtle differences between diet types, and weight loss improved PCOS in most studies regardless of diet composition. A Cochrane review of 15 trials found lifestyle changes may reduce weight by about 1.7 kg compared with minimal treatment, on low-quality evidence. Exercise improved fasting insulin, waist circumference (by about 2.6 cm) and body fat percentage against usual care.
What is the best diet for PCOS?
PCOS (now also called PMOS, polyendocrine metabolic ovarian syndrome, by the NHS) is a hormone condition that can affect periods, hair growth, skin, mood and weight. The NHS lists "weight gain or difficulty losing weight" among its main symptoms, and says the cause may be linked to hormones such as insulin and testosterone not working properly. So it makes sense that food comes up early.
The honest answer is that no one diet has been shown to be best. A systematic review that set out to inform evidence-based PCOS guidelines compared low-carbohydrate, high-carbohydrate, low-glycaemic index (low-GI), high-protein and monounsaturated fat-enriched approaches. It found only subtle differences between them, for example better menstrual regularity with a low-GI approach and greater drops in insulin resistance with lower-carbohydrate or low-GI eating, but these came from only five small studies. The clearest finding was that weight loss improved PCOS in most studies, whatever the make-up of the diet.
The 2023 international PCOS guideline, developed with professional and consumer organisations covering 71 countries, kept its emphasis on a healthy lifestyle, emotional wellbeing and quality of life, and asked clinicians to be aware of weight stigma. That last point matters: you deserve support, not blame.
PCOS weight loss: what actually helps
Weight loss with PCOS can feel slower and harder, and that is not in your head. But the things that help are the same things that help everyone, done consistently:
- A modest, steady calorie deficit. Not a crash plan. A deficit you can live with for months matters more than which foods create it.
- Protein at every meal. It can help you feel fuller and helps protect muscle while you lose weight. See how much protein women need.
- Fibre and slower-release carbohydrates. Wholegrains, beans, lentils, vegetables and fruit rather than mostly refined carbs.
- Regular exercise. In a review of 18 trials in women with PCOS, exercise improved fasting insulin, cholesterol, fitness, waist size and body fat percentage compared with usual care.
- Sleep and stress. They affect appetite and how easy it is to stick to anything.
Set your expectations kindly. In a Cochrane review of lifestyle programmes for PCOS, weight fell by about 1.7 kg more than with minimal treatment. That sounds small, but the evidence was low quality, and even modest losses can improve symptoms for some women.
A sample 7-day PCOS diet plan
- MonBreakfast: Greek yoghurt, berries, oats and seeds. Lunch: chicken, lentil and roasted veg salad. Dinner: salmon, new potatoes, broccoli.
- TueBreakfast: two eggs on wholegrain toast with spinach. Lunch: leftover salmon and bean salad. Dinner: turkey chilli with kidney beans and brown rice.
- WedBreakfast: overnight oats with milk and a spoon of peanut butter. Lunch: leftover chilli with salad. Dinner: tofu and vegetable stir-fry with noodles.
- ThuBreakfast: cottage cheese, pear and walnuts. Lunch: tuna and sweetcorn wholemeal wrap with salad. Dinner: chicken traybake with peppers, onions and chickpeas.
- FriBreakfast: Greek yoghurt, banana and oats. Lunch: lentil soup and a wholegrain roll. Dinner: homemade fish or bean tacos with slaw.
- SatBreakfast: veggie omelette and toast. Lunch: jacket potato with beans and cheese, side salad. Dinner: a meal out or a takeaway you enjoy.
- SunBreakfast: eggs, mushrooms, tomatoes and wholegrain toast. Lunch: roast chicken, roast potatoes and plenty of veg. Dinner: leftover chicken soup.
Snacks if you are hungry: fruit with yoghurt, a handful of nuts, hummus with veg, a boiled egg. Portions depend on your body and goals, so there are no calorie numbers here. Vegetarian? Swap meat and fish for tofu, beans, lentils, eggs or dairy.
PCOS food list: what to eat and what to limit
There are no "good" and "bad" foods for PCOS, but some choices make a balanced week easier:
- Base meals on: protein (eggs, fish, chicken, tofu, Greek yoghurt, beans, lentils), vegetables, fruit, wholegrains and potatoes with skins.
- Include: healthy fats such as olive oil, nuts, seeds and oily fish.
- Have less often: sugary drinks, sweets, pastries and very processed snacks. Not because they are forbidden, but because they are easy to overeat and do not keep you full.
- Be wary of: plans that cut out whole food groups, promise to "cure" PCOS or sell supplements as the answer. PCOS has no cure, and the NHS says treatments and lifestyle changes can help symptoms.
If you want simple meals you can repeat, a food diary that remembers them makes the week far easier to keep up.
Support for PCOS
Make a balanced week easier to keep
Turtle has PCOS support built in, with a food diary that sets your calories and protein and adjusts them at your weekly check-in. Save the meals you like and log them again in one tap.
4.6★ on the App Store · 100,000+ members · Free to download
PCOS exercise: how much and what kind
Exercise helps PCOS in its own right: in trials, it improved fasting insulin and waist size, not only weight. The UK Chief Medical Officers recommend at least 150 minutes of moderate activity a week, such as brisk walking, plus muscle-strengthening on at least two days. Any activity is better than none, so if that sounds like a lot, start with a daily walk and two short strength sessions.
In the PCOS trials, more measures improved with aerobic exercise such as brisk walking, cycling or swimming, but strength training is still worth adding: the UK guidelines recommend it for everyone, and it helps you keep muscle as you lose weight. Our strength training guide for women has a beginner plan. If your periods are irregular, it can also help to log your cycle and symptoms. Here is how to log a period in Turtle.
When to see your GP about PCOS
See your GP if you think you might have PCOS, or if your symptoms are affecting your daily life, work or relationships. The NHS says tests may include blood tests for hormone levels and insulin resistance. PCOS can raise the risk of type 2 diabetes and heart disease, so regular check-ups are worth having. Your GP may discuss treatments alongside lifestyle changes.
Good to know: Turtle has PCOS support built in, but it is not a diagnosis or a treatment. If you are trying to get pregnant, talk to your GP.
What the research says
Each study below was checked against its PubMed record, or read at source for NHS, NICE and government pages, on 7 October 2026.
The 2023 international PCOS guideline, developed with professional and consumer groups covering 71 countries, made 254 recommendations and practice points, kept its emphasis on healthy lifestyle, emotional wellbeing and quality of life, and called for awareness of weight stigma. It rated the evidence as generally low to moderate quality.
Teede HJ, Tay CT, Laven JJE, et al. (2023). Recommendations From the 2023 International Evidence-based Guideline for the Assessment and Management of Polycystic Ovary Syndrome. The Journal of clinical endocrinology and metabolism. 108(10):2447-2469 doi.org/10.1210/clinem/dgad463
A systematic review of diets for PCOS (five studies, 137 women) found subtle differences between diet types, and that weight loss improved PCOS in most studies regardless of diet composition.
Moran LJ, Ko H, Misso M, et al. (2013). Dietary composition in the treatment of polycystic ovary syndrome: a systematic review to inform evidence-based guidelines. Journal of the Academy of Nutrition and Dietetics. 113(4):520-45 doi.org/10.1016/j.jand.2012.11.018
A Cochrane review of 15 trials (498 women) found lifestyle intervention may reduce weight by about 1.7 kg and improve the free androgen index compared with minimal treatment, on low-quality evidence.
Lim SS, Hutchison SK, Van Ryswyk E, et al. (2019). Lifestyle changes in women with polycystic ovary syndrome. The Cochrane database of systematic reviews. 3(3):CD007506 doi.org/10.1002/14651858.CD007506.pub4
A meta-analysis of 18 trials found exercise improved fasting insulin, insulin resistance, cholesterol, fitness, waist circumference (about 2.6 cm) and body fat percentage (about 1.4 points) in women with PCOS, compared with usual care.
Kite C, Lahart IM, Afzal I, et al. (2019). Exercise, or exercise and diet for the management of polycystic ovary syndrome: a systematic review and meta-analysis. Systematic reviews. 8(1):51 doi.org/10.1186/s13643-019-0962-3
The NHS now calls PCOS polyendocrine metabolic ovarian syndrome (PMOS). It lists weight gain or difficulty losing weight among the main symptoms, says there is no cure but treatments and lifestyle changes can help, and advises seeing a GP if you think you have it.
NHS. Polyendocrine metabolic ovarian syndrome (PMOS), previously called polycystic ovary syndrome (PCOS). NHS website. Accessed 7 October 2026. www.nhs.uk/conditions/polycystic-ovary-syndrome-pcos/
The UK Chief Medical Officers recommend adults do at least 150 minutes of moderate activity a week and muscle-strengthening activities on at least two days.
UK Chief Medical Officers (2019). UK Chief Medical Officers' Physical Activity Guidelines (page updated July 2026). Department of Health and Social Care. www.gov.uk/government/publications/physical-activity-guidelines-uk-chief-medical-officers-report
Questions women ask
What is the best diet for PCOS weight loss?
No single diet has been shown to be best. A systematic review found only small differences between diet types, and weight loss improved PCOS whichever approach women used. Choose a balanced way of eating you can keep up.
Is there a free 7-day PCOS diet plan?
Yes, there is a sample 7-day plan on this page: three balanced meals a day built on protein, vegetables, wholegrains and beans. Adjust portions to your own needs.
How can I lose weight with PCOS fast?
Fast is rarely sustainable. A steady calorie deficit with protein at every meal, regular exercise including strength training, and good sleep is the approach the evidence supports.
What foods should I avoid with PCOS?
No food is off limits. It helps to have sugary drinks, sweets and highly processed snacks less often, and to be wary of plans that cut out food groups or promise a cure.
What exercise is best for PCOS?
Any regular exercise helps. A mix of brisk walking or other cardio and strength training on at least two days a week fits the UK guidelines and improves insulin and waist size in women with PCOS.
What is PMOS?
Polyendocrine metabolic ovarian syndrome. It is the new name the NHS uses for polycystic ovary syndrome (PCOS).
This guide is general information, not medical advice. It isn't tailored to you and doesn't replace advice from your GP or another qualified professional. If something's worrying you, speak to your GP. LeanShield™ is a trademark of ParrotPal Ltd: it rates the habits linked to protecting muscle, is not a medical device and doesn't measure muscle.