Many women with polycystic ovary syndrome (PCOS) find losing weight harder than expected, even when they are doing everything right. That is not a lack of willpower. PCOS affects insulin, appetite and hormones in ways that make weight gain easier and weight loss slower. The encouraging news is that even modest weight loss can make a real difference to symptoms.
This guide explains why weight loss is harder with PCOS, what works, the medical options and why it is worth it.
Why weight loss is harder with PCOS
- Insulin resistance: many women with PCOS have insulin resistance, which makes the body produce more insulin and store fat more easily, particularly around the middle.
- Appetite: hormonal changes can increase hunger and cravings.
- Higher androgens: raised male-type hormones are linked to fat stored around the tummy.
- Low mood and poor sleep: both are more common with PCOS and make healthy habits harder.
Not every woman with PCOS is overweight, and PCOS symptoms can occur at any weight.
Why it is worth it
For women with PCOS who are overweight, losing around 5 percent of body weight can improve periods, help ovulation return, reduce excess hair growth and lower the risk of type 2 diabetes. That is around 4kg for someone weighing 80kg.
What works
A steady calorie deficit
There is no single PCOS diet that works better than others. What matters most is a steady, sustainable reduction in calories that you can keep up, rather than a crash diet.
Protein and fibre at each meal
Protein and fibre keep you fuller for longer and help steady blood sugar. Build meals around lean protein, vegetables, pulses and wholegrains, and limit sugary drinks and refined carbohydrates.
Strength training plus cardio
Exercise improves insulin sensitivity, even before weight changes. Combining strength training two or three times a week with regular brisk walking or other cardio works well.
Good sleep and stress management
Short sleep increases appetite and worsens insulin resistance. A regular sleep routine helps.
Track body composition, not just weight
Muscle gain from strength training can mask fat loss on the scales. Measuring waist size and body composition shows progress more clearly.
Medical options
- Metformin: your GP may suggest it to improve insulin resistance, and it can help some women with weight and periods.
- Weight-loss medicines: for some people who meet the criteria, specialist services may discuss newer weight-loss medicines.
- Blood tests: checking blood sugar, cholesterol and thyroid function helps rule out other causes.
- Specialist referral: ask your GP if you are struggling despite sustained effort.
What to avoid
- Very low calorie crash diets, which are hard to sustain and cost muscle
- Expensive PCOS supplements with little evidence
- Cutting out whole food groups unless advised
- Judging progress only on the scales
Because insulin resistance sits behind many PCOS symptoms, our guide to how to reverse insulin resistance sets out a practical plan.
Frequently asked questions
What is the best diet for PCOS weight loss?
The best diet is one you can keep up. Meals built around protein, fibre and vegetables, with fewer refined carbohydrates and sugary drinks, suit most women with PCOS.
Does inositol help with PCOS weight loss?
Inositol is popular, but evidence for weight loss is limited. Speak to your GP or pharmacist before starting supplements.
How fast can I lose weight with PCOS?
A steady rate of around 0.5 to 1kg a week is realistic and more likely to last.
Can PCOS go away if I lose weight?
PCOS does not go away, but symptoms often improve significantly with weight loss.
PCOS weight support in Chiswick
Omnia Lifestyle offers one-to-one fitness and nutrition coaching, InBody body composition scans and blood tests for women with PCOS, alongside their GP, at our clinic in Chiswick, W4, close to Turnham Green station, on bus routes 94, E3 and 272. Limited parking is available on request when booking.
Read more about PCOS, insulin resistance and hormonal weight gain, see how to speed up your metabolism and whether you can get pregnant with PCOS, explore fitness and nutrition and InBody scans, or book an appointment.
This article is general information, not medical advice. Speak to your GP about medical treatment for PCOS.
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