PCOS and Insulin Resistance, in Plain Language
Insulin resistance gets mentioned in almost every PCOS conversation, but rarely explained. Here is what it actually means, and why it connects to your cycles, weight, skin and hair.
TL;DR: Insulin resistance means your cells respond poorly to insulin, so your body makes more of it, and that excess is linked to many PCOS symptoms including irregular cycles, skin and hair changes, and weight around the middle. Movement, sleep, and balanced meals help, and a clinician can test and advise. This is education, not medical advice.
If you have been told you have PCOS, or you suspect it, you have probably heard the words "insulin resistance" thrown into the conversation. A doctor mentions it, a friend repeats it, an article name-drops it, and everyone moves on as if you already know what it means. Most of the time, nobody stops to explain. So let us do that here, in plain language, this is September and PCOS Awareness Month is a good excuse to slow down and understand your own body a little better. PCOS is one of the most common hormonal conditions in women of reproductive age, affecting an estimated 10 to 13 percent worldwide, yet up to 70 percent of women who have it are never diagnosed. If you are still getting your bearings with the condition itself, our guide to PCOS explained walks through the symptoms and causes first.
What insulin is actually doing
Every time you eat, your body breaks food down into glucose, a sugar that circulates in your blood. Insulin is one of the chemical messengers your body uses to keep things in balance, the hormone your pancreas releases to move that glucose out of the blood and into your cells, where it becomes energy. Think of insulin as the key that opens the door of each cell. When the system works well, a small amount of insulin does the job and your blood sugar stays steady. This happens whether you eat jollof rice, pounded yam, injera, or bread. Food is not the enemy here, it is simply information your body has to process.
What "resistance" means
Insulin resistance is when the cells stop responding well to that key. The body stops responding to insulin the way it should, so glucose builds up in the blood instead of moving into the cells. The door sticks. The pancreas compensates by making more and more insulin to force the door open. For a while this works, and your blood sugar can look completely normal on a basic test, which is part of why insulin resistance is so easy to miss. If the relationship between blood sugar and hormones is new to you, it is worth reading on its own. But underneath, insulin levels are running high. That excess insulin is what quietly connects to so many PCOS symptoms.
How it links to your cycle, skin and hair
High insulin signals the ovaries to produce more androgens, the group of hormones that includes testosterone. Women have and need androgens, but too much shifts things. Raised androgens can interrupt the monthly release of an egg, which is why cycles become irregular, long, or skip altogether. The same hormonal shift shows up on the surface, acne along the jaw and chin, oilier skin, thinning hair at the scalp, or new hair on the face and body. And because high insulin encourages the body to store fat, especially around the middle, weight can become harder to manage, which in turn can deepen the insulin resistance. It is a loop, and understanding the loop is the first step to interrupting it.
Not everyone with PCOS has insulin resistance, but it is common. Major clinical guidance, including the 2023 international guideline coordinated by Monash University, describes insulin resistance with compensatory high insulin as present in around 85 percent of women with PCOS, across both higher and lower body weights. A detailed review of insulin resistance in PCOS traces how it plays out across muscle, fat and liver tissue. The point is not the exact percentage, it is that this is central to the condition for many women, not a side note.
Why it matters beyond the symptoms
Insulin resistance is worth taking seriously because it is linked, over time, to a higher chance of developing type 2 diabetes and to heart and metabolic health more broadly. The NHS notes that women with PCOS are at increased risk of type 2 diabetes later in life. That is not said to frighten you. It is said because it reframes PCOS from a purely cosmetic or fertility issue into something about your long-term health, and because much of what helps is within ordinary reach, not locked behind a prescription.
What is genuinely within your influence
This is the part that gets prescriptive fast in most articles, so here it stays honest. There is no single diet that fixes PCOS, and anyone selling you one is guessing. What research consistently points to is gentler and less glamorous. Movement matters, because muscles use glucose directly when they work, so regular activity you can actually keep up, walking, dancing, lifting, whatever fits your life, helps your cells respond to insulin again. Sleep matters, because short and broken sleep worsens insulin resistance on its own. And food patterns matter more than any single food, spreading meals out, pairing your staples with protein, vegetables and healthy fats so the glucose from that rice or yam arrives more slowly. You do not need to abandon the foods you grew up with. You are adjusting how they are balanced, not erasing your plate.
None of this is a cure, and none of it replaces care. If any of this sounds like you, a clinician can order the right tests and talk through options, some of which are medical, that are specific to your situation and body. This post is education, not medical advice, and you deserve a real conversation with someone who can examine you. If you have recently had a diagnosis and feel unsure what comes next, our guide on being just diagnosed with PCOS is a gentler starting point.
What you can do in the meantime is arrive at that conversation prepared. This is where Asele fits, quietly. Cycle tracking and symptom logging over a few months give you a real record instead of a vague memory, when your periods came, what your skin and energy were doing, what shifted. Amara can help you make sense of the patterns in your own language. You bring that to your clinician, and the appointment starts from something solid. Understanding your body is not the whole answer, but it is a fair place to begin.
References
- World Health Organization. Polycystic ovary syndrome (fact sheet). who.int
- National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK). Insulin Resistance & Prediabetes. niddk.nih.gov
- Monash University. International Evidence-based Guideline for the Assessment and Management of Polycystic Ovary Syndrome 2023. monash.edu
- Insulin resistance in polycystic ovary syndrome across various tissues: an updated review of pathogenesis, evaluation, and treatment (PMC). pmc.ncbi.nlm.nih.gov
- NHS. Polycystic ovary syndrome (PCOS). nhs.uk
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