PCOS and stubborn weight: why it's harder and what actually helps

Why weight feels stuck with PCOS

The U.S. Office on Women's Health (OWH) lists "weight gain or difficulty losing weight" as a common PCOS symptom, along with irregular periods, acne, extra facial or body hair and thinning scalp hair. Between 5% and 10% of women ages 15 to 44 have PCOS, according to OWH.

Two things are usually in play:

• Insulin resistance. Insulin moves sugar from your blood into your cells. With insulin resistance, your cells don't respond normally, so your body makes more insulin. OWH says many women with PCOS have insulin resistance, especially those with higher weight, a family history of type 2 diabetes, or low activity. The American College of Obstetricians and Gynecologists (ACOG) notes that insulin resistance can lead to diabetes.
• Higher androgen levels. Androgens are hormones that everyone makes, but people with PCOS make more. OWH says this can stop the ovaries from releasing an egg each cycle and can cause acne and extra hair growth.

These are real biological differences, not a lack of effort. The guideline says people with PCOS may face greater challenges with weight management, and it encourages realistic, tailored goals.

If you've been told to "just eat less," our guide to why weight stalls when you're eating less explains why that often isn't enough on its own.

Does PCOS need a special diet?

No. This is one of the clearest points in the 2023 International Evidence-based Guideline for the Assessment and Management of PCOS. It says there is "no evidence to support any one type of diet composition over another" for weight, metabolic, hormonal, reproductive or psychological outcomes in PCOS.

It also says any diet that matches general healthy-eating guidelines will have health benefits. In practice that means the best PCOS diet is the healthy pattern you can actually keep, built around your own preferences, not a strict plan you'll drop in a month.

That's worth knowing because PCOS diets are heavily marketed. Plans that cut out whole food groups, promise to "reset hormones," or sell supplement bundles go further than the evidence does.

What about inositol?

Inositol is a supplement often sold for PCOS. The guideline says it could be considered based on personal preference, with limited harm and possible small improvements in metabolic measures, but limited benefit for ovulation, hair growth or weight. It also notes that supplements aren't regulated like medicines, so quality and amounts can vary. If you take it, tell your doctor.

Activity: what the guideline suggests

The guideline's activity advice for adults with PCOS follows general population advice:

• To prevent weight gain and maintain health: at least 150 to 300 minutes of moderate activity a week, or 75 to 150 minutes of vigorous activity, or a mix of both.
• For modest weight loss and preventing regain: at least 250 minutes a week of moderate activity, or 150 minutes of vigorous activity.
• Muscle strengthening: on two non-consecutive days a week.

Any amount helps. The guideline says doing some physical activity is better than none, and that swapping sitting time for activity of any intensity, even light, has health benefits.

Long-term change usually comes down to small habits repeated, which is where a health companion app can help. Olive checks in with you every day, looks at what you eat, and helps you build small habits that actually hold. It doesn't diagnose or treat anything, so PCOS care still belongs with your doctor.

Weight stigma is part of the problem

The 2023 guideline spends real time on weight stigma. It says many women with PCOS experience weight stigma in health care, that professionals should be aware of their own weight biases, and that all women should get best-practice care regardless of weight.

It also acknowledges something many people with PCOS already feel: weight may not change much with lifestyle changes alone. If you've been doing the work and the scale won't move, that's a reason for a fuller conversation with your doctor, not a reason to blame yourself.

Medicines that may help

Lifestyle is the base, but it isn't the only tool. Options your doctor may discuss include:

• Metformin. OWH says metformin, often used for type 2 diabetes, may help some women with PCOS by improving how the body uses insulin and lowering insulin and androgen levels. It isn't FDA-approved for PCOS. The guideline says metformin should be considered for adults with PCOS and a BMI of 25 or higher to help with weight and metabolic measures such as insulin resistance, that metformin and active lifestyle changes work about equally well, and that metformin has more stomach side effects than inositol.
• GLP-1 drugs. The guideline says anti-obesity medicines including liraglutide and semaglutide, both GLP-1 receptor agonists, and orlistat could be considered alongside active lifestyle changes for higher weight in adults with PCOS. It adds that effective contraception is needed when pregnancy is possible, because safety data in pregnancy are lacking.
• Birth control pills. These are often used for irregular cycles, acne and extra hair. They aren't a weight treatment.

None of these is a quick fix, and each has side effects and trade-offs. Your doctor is the one to weigh them with you.

What a modest loss can do

You don't have to reach a "goal weight" to see benefits. OWH says even a 10% loss of body weight, for example 15 pounds for someone who weighs 150 pounds, can make the menstrual cycle more regular and improve the chance of getting pregnant. ACOG says even a small loss may help regulate periods, and that weight loss has been found to improve cholesterol and insulin levels and relieve symptoms like acne and excess hair growth.

Other things worth checking

PCOS overlaps with other conditions that can affect energy, appetite and weight. The guideline says people with PCOS have a higher rate of obstructive sleep apnea, independent of weight, and should be asked about snoring, waking unrefreshed and daytime sleepiness. It also notes high rates of anxiety and depression.

Other conditions can look like PCOS, so the guideline's diagnostic steps include ruling them out, starting with a thyroid test (TSH). Our guide to thyroid, cortisol and what to check when you can't lose weight covers those tests. If you've seen "cortisol belly" content blaming stress hormones, our cortisol belly guide sorts out what's real.

Questions to bring to your doctor

• Do my symptoms fit PCOS, and what else should we rule out?
• Should I be checked for prediabetes, diabetes or high cholesterol?
• Could sleep apnea be part of what's going on?
• Is metformin or another medicine worth considering for me?
• What's a realistic goal for me, and how will we track progress besides the scale?

Frequently asked questions

Why is it so hard to lose weight with PCOS?

Many people with PCOS have insulin resistance and higher androgen levels, which can make weight harder to lose. The 2023 guideline recognizes that people with PCOS may face greater challenges with weight.

What is the best diet for PCOS weight loss?

There isn't one. The 2023 international guideline found no evidence that any one diet works better than another for PCOS. A healthy eating pattern you can stick with is the goal.

How much exercise should I get with PCOS?

The guideline suggests at least 150 to 300 minutes of moderate activity a week, or 250 minutes for modest weight loss, plus muscle strengthening twice a week.

Does metformin help with PCOS weight loss?

It may help some people. The guideline says it should be considered for adults with a BMI of 25 or higher and works about as well as active lifestyle changes. It isn't FDA-approved for PCOS.

Can GLP-1 drugs be used for PCOS?

The guideline says GLP-1 drugs such as semaglutide could be considered, alongside lifestyle changes, for higher weight in adults with PCOS. Contraception is needed when pregnancy is possible.

How much weight do I need to lose to help PCOS symptoms?

Not much. OWH says even a 10% loss can make cycles more regular, and ACOG says even a small loss may help.

Small habits, steady support

PCOS weight changes slowly, and steady support matters more than a perfect plan. Olive checks in with you every day and notices what's keeping your body stuck. Our guide to the best app for stubborn weight covers what an app can and can't do.

If steady habits haven't moved stubborn weight, Olive's Protocol is one option to look into. Prescriptions are only written after a medical consultation with a licensed provider. Not everyone qualifies.

See how Olive works →

This guide is general information, not medical advice. Talk with your doctor about PCOS, and don't start, stop or change any medicine or supplement on your own.