nutrition for PMOS (formerly PCOS)

If you've been diagnosed with PMOS and the first thing your doctor, or someone on the internet, told you was "cut the carbs," I want you to read this whole post before you do anything drastic.

PMOS (Polyendocrine Metabolic Ovarian Syndrome, also known as PCOS) affects roughly 1 in 10 women of reproductive age. It shows up differently in everyone: irregular periods, acne, unwanted hair growth, difficulty losing weight, energy crashes, and mood swings are all common presentations. And yes, it can make training feel harder than it should.

But here's the thing. It's manageable. And nutrition is one of the most powerful tools you have. Not restrictive dieting. Not cutting food groups. Actual, targeted eating strategy.

What's actually happening in your body

To understand how to eat for PMOS, you first need to understand insulin resistance, because this is the central mechanism driving most of the symptoms you're dealing with.

Insulin is a hormone released by your pancreas whenever you eat carbohydrates. Its job is to move glucose from your bloodstream into your cells, where it gets used for energy. In a woman without PMOS, this system works smoothly.

In women with PMOS, cells are less responsive to insulin, up to 35–40% less sensitive on average. That means your pancreas has to produce more insulin than normal to do the same job. And chronically elevated insulin doesn't just affect blood sugar. It directly disrupts your hormonal environment. It signals the ovaries to produce more androgens (think testosterone), which drives many of the symptoms you might be experiencing: irregular cycles, acne, hair loss on the scalp, unwanted hair growth elsewhere.

So when we talk about nutrition management for PMOS, we're really talking about managing insulin. Keeping it in a healthier range so your hormones can do their jobs properly.

Let's talk about carbs (because everyone gets this wrong)

The most common advice women with PMOS receive is to go low-carb or keto. I understand why. If insulin resistance is the problem, and carbs raise insulin, cutting carbs seems logical. And for some women, some degree of carbohydrate reduction does help.

But the evidence doesn't support a blanket low-carb prescription. And for women who train, who are lifting, doing CrossFit, powerlifting, or any kind of resistance work, carbohydrates are genuinely essential. They're your muscles' primary fuel source. Cutting them too aggressively tanks your performance, wrecks your recovery, and usually leads to a restrict-binge cycle that makes everything worse long-term.

What the research actually supports is focusing on three things, in this order:

Carb quality first. Not all carbohydrates have the same effect on insulin. Foods that digest slowly, like wholegrains, legumes, most fruits and vegetables, produce a gentler, more gradual blood glucose response. Your pancreas doesn't have to dump a large amount of insulin all at once. Foods that digest rapidly, especially when eaten in isolation, spike glucose and insulin quickly. This doesn't mean you can never eat white bread. Context matters enormously.

Carb quantity second. Portion size matters, but not in the "eat as little as possible" sense. You need enough carbohydrates to fuel your training and support recovery. The goal is appropriate portions distributed across the day, not restriction.

Carb timing and pairing third, and this one is underrated. Eating carbohydrates alongside protein, fat, and fibre significantly blunts the glucose and insulin response. A bowl of white rice eaten alone hits your bloodstream very differently to the same rice eaten with chicken, olive oil, and salad. Distributing your carbs across meals rather than loading them all into one sitting also helps.

Practical carb choices to prioritise: oats, wholegrain bread, lentils, chickpeas, sweet potato, quinoa, brown rice, and whole fruit. White rice, regular pasta, and pita are all fine in context, paired with protein and fat, as part of a balanced meal.

How to build your plate

Forget complicated macro tracking for a moment. The most practical thing you can do is build every main meal around a simple structure.

Roughly half your plate should be vegetables. They slow digestion, improve gut health, and provide the micronutrients your hormonal system depends on. A quarter should be a quality protein source. A quarter should be your carbohydrate. Add a source of healthy fat: olive oil, avocado, tahini, nuts, or seeds.

Protein deserves special attention. It's the most satiating macronutrient, it has minimal effect on insulin, and it supports the muscle mass that itself improves insulin sensitivity. If you're training regularly, aim for around 1.6–2g of protein per kg of bodyweight per day. Good options that are easy to find in Israel: eggs, tuna, cottage cheese, chicken, turkey, Greek yoghurt, legumes, and fish.

Anti-inflammatory eating, the second layer

Insulin resistance and PMOS are both associated with low-grade chronic inflammation. This is partly why many women with PMOS feel worse when eating a heavily processed diet, and better when eating patterns closer to a Mediterranean model.

You don't need to follow a named diet, but consistently including anti-inflammatory foods has real, documented benefits for hormonal markers in PMOS.

The core list: oily fish (salmon, sardines, mackerel), walnuts, flaxseeds, extra virgin olive oil, avocado, berries, dark leafy greens, colourful vegetables, and herbs like turmeric and ginger.

Israel actually has a strong natural foundation here. The local food culture already centres on olive oil, legumes, vegetables, tahini, and fresh herbs.

What about weight loss?

This is the part I want to be genuinely honest about, because it's where a lot of harmful advice comes in.

Yes. If you're above a weight that is affecting your health, evidence shows that even a 5% reduction in body weight can meaningfully improve PMOS symptoms: more regular cycles, lower androgen levels, improved insulin sensitivity. That's significant and worth knowing.

But here's the part that often doesn't get said: PMOS makes fat loss genuinely harder. The insulin resistance, the elevated androgens, the disrupted hunger hormones, they're all working against you. Women with PMOS who try standard calorie restriction often find they have to work harder for the same result as someone without the condition.

What this means in practice: aggressive, rapid fat loss approaches tend to backfire for women with PMOS. They create physiological stress, they further disrupt the hormonal environment, and they're rarely sustainable. A moderate, consistent calorie deficit, around 200–400 kcal per day, with high protein intake and strength training tends to produce far better outcomes than crash dieting.

And for women who are already at a healthy weight but still have PMOS? Weight loss is not the primary management tool. Focus on the quality and structure of your eating instead.

Common PMOS myths, addressed

"You must go keto to manage PMOS." Low-carb approaches can help some women, but the evidence doesn't make it mandatory. For women who lift, carb restriction often hurts performance and recovery without meaningful added benefit over a well-structured moderate-carb diet. Quality and pairing matter more than quantity.

"Fruit is too sugary, avoid it." Whole fruit is packaged with fibre, water, and micronutrients that slow glucose absorption significantly. The research does not support avoiding fruit in PMOS management. Juice is a different story.

"I need to eat every 2–3 hours to keep blood sugar stable." This is overstated. Most women do well with three balanced meals, with optional snacks around training. There's no strong evidence that mandatory grazing is necessary, and for some people, fewer, larger meals actually improve insulin sensitivity.

"I just need the right supplement stack." Some supplements have reasonable evidence: myo-inositol, vitamin D (if you're deficient), omega-3s, and magnesium all have decent data for PMOS support. But no supplement replaces consistent nutrition. Many popular PMOS stacks are marketed on minimal evidence. If you want to explore this, get your bloodwork done and work with someone who can actually interpret it.

A note for women who lift

Resistance training is one of the most evidence-supported lifestyle interventions for PMOS, independent of weight loss. It directly improves insulin sensitivity by increasing the amount of glucose your muscles can absorb without insulin's help.

If you're already powerlifting or doing structured strength work: keep going. Don't let a PMOS diagnosis push you toward more cardio and less food.

If you're under-eating to manage your weight and also training hard, that pattern is worth examining. Low Energy Availability, where your intake doesn't meet your training demands, worsens hormonal disruption and can make PMOS symptoms worse, not better. Eating enough to support your training is part of managing your condition, not in conflict with it.

And please don't skip carbs before or after training in the name of PMOS management. Pre-workout carbohydrates fuel performance. Post-workout carbohydrates restore glycogen. The training session itself is actively improving your insulin sensitivity in real time. Don't undermine it by under-fuelling.

Where to start

Stop thinking about what to remove and start thinking about what to add and how to pair things.

Add protein to most meals, including breakfast. For the most part, pair carbs with protein, fat, or both. Get your vitamin D levels checked if you haven't. Add oily fish at least once a week (sardines in Israel are cheap and excellent). And if you're training, eat enough to actually support that training.

PMOS is manageable. The food doesn't have to be complicated. And restriction is not the answer.

References: Teede et al. (2023), International evidence-based guideline for PCOS, Human Reproduction Open. Moran et al. (2013), Dietary composition in PCOS treatment, J Acad Nutr Diet. Barrea et al. (2019), Mediterranean diet adherence in women with PCOS, Nutrients. Unfer et al. (2016), Effects of myo-inositol in women with PCOS, Gynecological Endocrinology.