PCOS Diet: What to Eat with PCOS, from a Dietitian

You have PCOS, you've been told to "eat better" or "lose some weight", and nobody has told you what that actually means. Search for a PCOS diet and you get keto, no dairy, no gluten, no fruit, and a shelf of supplements that all claim to fix your hormones.

I want to give you the calmer version. There is no single diet for PCOS. A few things help most people with it, and the rest depends on you. Here's what I would tell you if you were sitting across from me.

Is there a specific PCOS diet?

No. No eating pattern has been shown to be the one right answer for PCOS, and the guidance I follow doesn't name one. What helps is a balanced way of eating you can keep up for years, built around how PCOS tends to affect the body. If a plan asks you to cut out whole food groups for good, be wary. Strict rules are hard to live with, and most people end up back where they started. I've written more about why diets fail if that sounds familiar.

Why does insulin matter with PCOS?

Insulin resistance is common in PCOS, including in people who are not carrying extra weight. Your body has to make more insulin to keep blood sugar steady, and higher insulin can feed into some PCOS symptoms. It also raises the long-term risk of type 2 diabetes.

Food won't cure PCOS. What you can change is how your meals affect your blood sugar and insulin, and that's where most of the useful advice comes from.

What should I eat with PCOS?

These are the basics I start with for almost everyone:

• Eat regular meals. Three a day, with a snack if you need one, rather than skipping breakfast and grazing later.
• Have some protein at every meal: eggs, fish, chicken, beans, lentils, tofu or Greek yoghurt.
• Add fibre at every meal from vegetables, fruit, pulses, oats and wholegrains.
• Choose wholegrain and lower-GI carbohydrates, such as oats, wholegrain bread, brown rice, beans and lentils, over white bread, sugary cereals and pastries.
• Keep carbohydrates in, in sensible portions. You don't need to cut them out, and it's hard to keep up if you do.
• Include healthy fats like olive oil, nuts, seeds and oily fish.
• Keep sugary drinks and heavily processed snacks for now and then.

Eating carbohydrates alongside protein and fibre slows down how fast sugar reaches your blood. For a lot of people that means fewer energy dips and less intense cravings in the afternoon. Here's what it can look like on a plate:

None of these foods are banned. Use the table as a direction to head in. Nobody is checking your plate.

Do I need to lose weight to help PCOS?

Not everyone with PCOS needs to, and weight is only part of the picture. If you are carrying extra weight, losing a modest amount can help some people, for example with more regular periods and better insulin sensitivity. It can help. It isn't guaranteed, and it varies from person to person.

Losing weight with PCOS can also feel slower and harder than it does for your friends. That isn't a lack of willpower, and it's one reason crash diets tend to backfire. A small, steady change you can keep is worth more than a big number you can't. If you want to know what steady progress looks like, read how much weight you can realistically lose in three months.

Do PCOS supplements work?

You'll see a lot of supplements sold for PCOS. Some may help some people, many have weak evidence behind them, and some can interact with medication. I don't recommend starting any of them on your own. If one interests you, talk it through with your doctor or a dietitian who knows your history, so you aren't paying for something that does nothing for you.

Can diet replace PCOS medication?

No. Nutrition works alongside your medical care. Your GP, gynaecologist or endocrinologist handles diagnosis, blood tests and medication. My job is the part they rarely have time for: what you eat, when you eat, and how to make changes stick around the rest of your life. Keep your doctor in the loop about any changes you make.

Why doesn't a generic PCOS meal plan work for me?

PCOS looks different in different people. One person is mostly dealing with irregular periods. Another has acne and unwanted hair growth. Someone else is trying to conceive, or has insulin resistance and a family history of diabetes, or has spent years dieting and now has a difficult relationship with food. A downloaded 7-day meal plan can't tell those situations apart.

It also doesn't know that you work shifts, hate fish, cook for three children or eat most of your food after 8pm. That's usually where plans break. When I work with someone with PCOS, we start with what you already eat and change the few things that will make the biggest difference to your symptoms. Then we adjust as we go.

PCOS is a long-term condition, so one appointment is often not enough to see what's working. That's why I usually suggest three sessions for PCOS: the first to understand your situation and agree a plan, the next two to review what happened and adjust. You book them one at a time, so they fit around your life.

Is it worth seeing a dietitian for PCOS?

It's a fair question, and the honest answer is: not always. If you've only just been diagnosed and want the basics, the list above may be enough to get you going, and you can come back later. If you've tried the free advice, cut things out, put them back, and still feel stuck or confused, that's usually when personalised help saves you time and money.

Some people also worry about being judged for what they eat or what they weigh. You won't be. I see people at every size and with every kind of eating history, and our sessions are about what is realistic for you. Three sessions cost $400 in total. If cost is the main thing holding you back, you can read what an online dietitian costs and what you get for it.

This article is general information about nutrition and PCOS. It isn't individual medical advice, and it doesn't replace your doctor. If you have symptoms you haven't had checked, or questions about medication or fertility, please speak to your doctor first.