PCOS and Weight: What Actually Helps
It can make weight gain easier and weight loss harder. There's no special "PCOS diet," but there are real options, and it's not your fault.
The short version
- PCOS affects about 1 in 10 women of reproductive age, and many haven't been diagnosed.
- Insulin resistance is common, and it can make managing your weight harder.
- International guidelines don't back a single best diet. Choose one you can stay on.
- Losing as little as 5% of your weight can help your cycles and metabolic health.
What PCOS is
Polycystic ovary syndrome is a common hormonal condition. It's usually diagnosed when someone has at least two of these three things:
- Irregular or absent periods
- Signs of high androgens (such as excess facial or body hair, acne or hair thinning), or high levels in a blood test
- Polycystic ovaries on ultrasound, or a high blood test level of anti-Müllerian hormone (AMH) in adults
Other causes, such as thyroid problems, have to be ruled out. It's not always tied to weight. People of any size can have PCOS.
Why weight can be harder
Many people with PCOS have insulin resistance, which means the body needs to produce more insulin. High insulin, in turn, can drive up androgens. Together, this can favor weight gain, especially around the middle, and it may affect appetite. Research on whether metabolism itself is lower is mixed. People with PCOS also have a higher risk of type 2 diabetes, high cholesterol, sleep apnea, anxiety and depression.
Your experience of working hard without seeing results may well be real. It isn't a lack of effort.
What helps
Food
You'll see a lot of strict PCOS diets online: no dairy, no gluten, no carbs. The 2023 international guideline found that no single diet is better than the others for PCOS. A healthy pattern with a modest calorie deficit is what works. Good building blocks include:
- Plenty of fiber and vegetables
- Protein at every meal
- Fewer refined carbs and sugary drinks
- A Mediterranean or lower-carb approach, if that's what you like
If you're struggling with restrictive eating, please be aware that disordered eating is more common in people with PCOS. There's support here.
Movement
Exercise improves insulin sensitivity, even without weight loss. Aim for at least 150 minutes of moderate activity a week, with strength training twice a week.
Weight loss, if it's a goal for you
Losing about 5% of your weight can improve your cycles, ovulation, and your insulin and androgen levels.
Sleep and mental health
Get checked for sleep apnea, and don't overlook your mental health. Anxiety and depression are common with PCOS and should be treated in their own right.
Medical treatment
Options depend on your goals:
- Combined birth control pills: Regulate cycles and lower androgens.
- Metformin: Can help with insulin resistance and weight, and may help with cycles.
- Anti-androgens such as spironolactone: Used for excess hair and acne. They can't be used during pregnancy.
- Letrozole: Often the first choice when trying to conceive.
- GLP-1 medications: Used by some people with PCOS and obesity. These must be stopped before pregnancy, so make a plan with your prescriber, particularly as weight loss can improve fertility. Tirzepatide can also make birth control pills less reliable, so ask about backup contraception.
What about supplements?
Inositol is widely promoted for PCOS, and some small studies show benefits. The guideline considers it experimental, as evidence is limited, though risks seem low. Talk to your clinician first, and see our supplement guide.
Sources
This guide is general information, not medical advice. Please check with a clinician before making big changes, especially if you have a health condition, take medication, or are pregnant. Read the full disclaimer.
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