How to Lose Weight With PCOS (PMOS): What the Guidelines Say
How to lose weight with PCOS: why 5 to 10% matters, why no diet wins, how much exercise the 2023 guideline advises, Indian meals, and when to see a doctor.
To lose weight with PCOS, use the same approach that works for anyone, with more patience and medical support: a modest calorie deficit from a healthy diet you can keep up, 150 to 300 minutes of activity a week plus strength training twice a week, and regular check-ups. The 2023 international guideline found no single diet works better than another for PCOS. Losing 5 to 10% of your weight, if you're carrying extra, can bring real improvements, and a healthy lifestyle helps even if the scale barely moves.
One note on the name. In May 2026, a global consensus published in The Lancet renamed polycystic ovary syndrome as polyendocrine metabolic ovarian syndrome (PMOS), because the old name wrongly implied ovarian cysts. The NHS already uses the new name. Most people in India still search for PCOS, so this post uses both. The guidance hasn't changed.
What does the guideline actually recommend?
The 2023 International Evidence-based Guideline for PCOS, led by Monash University in partnership with ESHRE, the Endocrine Society, ASRM and the European Society of Endocrinology, is the main international reference. Its 2018 version was used in 196 countries. Here's what it says about lifestyle, in plain language.
| Topic | What the 2023 guideline says |
|---|---|
| Who it applies to | Healthy lifestyle is recommended for all women with PCOS, at any weight |
| Weight loss | In those with higher weight, weight management can bring significant clinical improvements; a tailored calorie deficit is the approach |
| Benefit without weight loss | There are benefits to a healthy lifestyle even without weight loss |
| Best diet | No evidence that any one diet type is better than another |
| Best exercise | No evidence that any one type or intensity is better than another |
| Activity for health | 150–300 min moderate or 75–150 min vigorous a week, plus muscle strengthening on 2 non-consecutive days |
| Activity for weight loss | At least 250 min moderate or 150 min vigorous a week, plus muscle strengthening ideally on 2 non-consecutive days |
| Weight stigma | Health professionals should be aware of it when discussing lifestyle |
| Eating disorders | Should be considered in PCOS at any weight, especially during weight management |
The guideline also says healthy lifestyle and weight management, with structured and ongoing support, appear to work as well in PCOS as in the general population. Weight loss isn't impossible with PCOS. It's the same process, often with more symptoms getting in the way.
How much weight do you need to lose?
Less than most people think. The earlier 2018 version of the guideline set "achievable goals such as 5% to 10% weight loss in those with excess weight", saying this brings significant clinical improvements and counts as successful weight reduction within six months.
A hypothetical example:
- At 80 kg, 5% is 4 kg and 10% is 8 kg
- At 70 kg, 5% is 3.5 kg and 10% is 7 kg
Over six months, that's well under half a kilo a week. Steady, not dramatic.
The 2023 guideline adds that waist measurements and metabolic health are worth tracking alongside weight. You can check yours with the waist-to-height ratio calculator; our post on waist-to-height ratio explains what the numbers mean.
If you're not overweight, the guideline's focus is different: a healthy lifestyle and preventing excess weight gain, not weight loss.
What should you eat with PCOS?
There's no special "PCOS diet". The guideline says any diet consistent with general healthy eating guidelines will help, tailored to your preferences, and that unduly restrictive and nutritionally unbalanced diets should be avoided. That rules out crash diets, juice cleanses and cutting out whole food groups without a medical reason.
For India, the general healthy eating guideline is ICMR-NIN's. The Dietary Guidelines for Indians 2024 "My Plate for the Day" suggests:
- Vegetables, fruits, greens, roots and tubers making up about half the plate
- Cereals and millets at no more than 45% of calories, with at least half as whole grains such as millets
- Pulses, eggs and flesh foods at about 14–15% of calories
- Total fat at or under 30% of calories
- Nuts, oilseeds, milk and curd at about 8–10%
What that looks like in Indian meals
A typical North Indian lunch of 4 rotis, a small katori of sabzi and a little dal is heavy on cereal and light on vegetables and protein. A version closer to the ICMR-NIN plate:
| Meal | Typical | Closer to My Plate |
|---|---|---|
| Breakfast | 2 aloo parathas with butter | 1 besan or moong dal chilla with curd, or 2 eggs with 1 roti and vegetables |
| Lunch | 4 rotis, small sabzi, a little dal | 2 rotis (one can be bajra or jowar), 2 katoris sabzi, 1 katori thick dal, salad |
| Evening | Chai with biscuits or namkeen | Chai with roasted chana or a fruit |
| Dinner | Rice, dal, fried snack | 1 katori rice or millet, dal or paneer or fish, a big katori of vegetables |
These are examples, not a prescription. The guideline's point is that the plan should be co-developed with you and fit your food preferences, family meals and budget.
How many calories?
The guideline says a tailored calorie deficit could be prescribed, based on your energy needs, body weight and activity. Get a starting estimate with the calorie calculator, aim for a modest deficit, and don't go below about 1,200 kcal a day without medical supervision. If you want a ready structure, our 1,500 calorie Indian diet plan is a reasonable template for many women who are losing weight.
How much exercise helps with PCOS?
The guideline gives clear numbers, matching general population advice:
- For health and to prevent weight gain: 150–300 minutes of moderate activity (brisk walking, cycling, dancing) or 75–150 minutes of vigorous activity a week, plus muscle strengthening on 2 non-consecutive days
- For modest weight loss and keeping it off: at least 250 minutes of moderate or 150 minutes of vigorous activity a week, plus muscle strengthening ideally on 2 non-consecutive days
- Sit less: replacing sitting with any activity, even light, has health benefits
No type of exercise was found to be better than another, so pick what you'll keep doing. A sample week that meets the weight-loss target:
- Brisk walk 50 minutes, 5 days a week = 250 minutes
- Strength training 2 days a week (say Tuesday and Friday), 30–45 minutes
The earlier guideline suggested building up gradually, starting with 10-minute bouts and adding about 5% a week. If you've never lifted, our weight training for women guide has an 8-week starter plan and answers the "will I get bulky?" question.
Sleep, mood and other things that affect weight
Sleep apnoea. The 2023 guideline says women with PCOS have a significantly higher rate of obstructive sleep apnoea than women without it, regardless of weight. Signs include snoring with waking up unrefreshed, daytime sleepiness or fatigue. If that sounds like you, tell your doctor; diagnosis needs a sleep study.
Depression and anxiety. The guideline says these are very common in PCOS and recommends screening all adults. Low mood makes it much harder to stick to any plan, so it's worth raising with your doctor.
Disordered eating. The guideline specifically warns that eating disorders should be considered at any weight, especially during weight loss. If dieting is making you anxious around food, bingeing or restricting, get help before pushing harder.
What about medicines and supplements?
That's a decision for you and your doctor, not a gym or a blog. For context, the NHS lists treatments including contraceptive pills or a hormonal coil, metformin, weight loss medicines and medicines for fertility, hair and acne. The 2023 guideline says:
- Metformin should be considered for adults with PCOS and a BMI of 25 or more, for weight and metabolic outcomes
- Anti-obesity medicines, including GLP-1 drugs, could be considered alongside active lifestyle change, as for anyone else, with effective contraception because pregnancy safety data are lacking
- Inositol has limited harm but limited clinical benefit for weight
Don't start, stop or change any medicine because you've started a diet or training plan.
When should you see a doctor?
See a doctor if you think you might have PCOS or PMOS, or if symptoms such as irregular or missed periods, excess hair, acne, hair loss or difficulty getting pregnant are affecting your life. Also ask about:
- Blood sugar testing: the guideline says women with PCOS have higher risk of type 2 diabetes regardless of age and weight, and recommends assessing glycaemic status at diagnosis and every 1–3 years
- Blood pressure: measured every year, and when planning pregnancy
- Unusual or very infrequent periods: the guideline notes a markedly higher risk of endometrial hyperplasia and cancer before menopause, so discuss your cycle pattern with your doctor
- Snoring and daytime tiredness (possible sleep apnoea)
- Low mood, anxiety or a difficult relationship with food
If you're pregnant, planning pregnancy or under 18, get medical advice before changing your diet or exercise.
The short version
- PCOS is now also called PMOS; the advice is the same
- Aim for 5–10% weight loss over about six months if you're carrying extra weight
- Lifestyle helps even without weight loss
- No diet type is proven best; pick a healthy one you can keep, using the ICMR-NIN plate
- Do 150–300 min of activity a week (250+ for weight loss) plus 2 strength sessions
- Keep calories above about 1,200 a day unless supervised
- Medicines are your doctor's call; get blood sugar, BP, mood and sleep checked
Useful links
- Teede et al. 2023: International Evidence-based Guideline for PCOS
- 2018 international PCOS guideline recommendations (full text)
- The Lancet 2026: PMOS, the new name for PCOS
- NHS: Polyendocrine metabolic ovarian syndrome (PMOS)
- ICMR-NIN Dietary Guidelines for Indians 2024
This is general information, not medical advice.
Frequently asked questions
Why is it so hard to lose weight with PCOS?
Weight gain and difficulty losing weight are listed by the NHS as common symptoms, and insulin resistance is part of how the condition works. The international guideline still finds that structured lifestyle and weight management work about as well in PCOS as in the general population, so the same tools apply; progress may just need more support and patience.
Is a keto or low-carb diet best for PCOS?
The 2023 international guideline found no evidence that any one type of diet is better than another for weight, hormones, fertility or mood in PCOS. Any healthy diet you can stick to works, and the guideline warns against unduly restrictive or unbalanced diets.
Can PCOS go away if I lose weight?
There is no cure, according to the NHS, but symptoms can improve. The 2018 guideline said losing 5 to 10% of body weight in people with excess weight brings significant clinical improvements.
Do supplements like inositol help with PCOS weight loss?
The 2023 guideline says inositol could be considered based on personal preference, with limited harm and possible improvement in metabolic measures, but limited clinical benefit for weight, ovulation or excess hair. Talk to your doctor before starting any supplement.