Insulin Resistance and PCOS: How It Drives Symptoms and What Helps

If PCOS has an engine, insulin resistance is a big part of it. It helps explain why periods go missing, why acne and hair growth appear, and why sugar cravings can feel relentless.

What insulin resistance means

Insulin is the hormone that moves sugar (glucose) from your blood into your cells for energy. With insulin resistance, cells respond less well, so the pancreas releases more insulin to get the same job done.

For a while, blood sugar stays normal because insulin levels rise to compensate. Over time, that extra demand can lead to prediabetes and type 2 diabetes.

How it fuels PCOS symptoms

High insulin levels do more than manage blood sugar. In PCOS they:

• Push the ovaries to make more androgens, which can cause acne, excess hair and scalp hair loss
• Lower SHBG, a protein that binds testosterone. Less SHBG leaves more “free” testosterone active
• Disrupt ovulation, leading to longer or missing cycles
• Increase hunger and cravings, especially for quick carbohydrates, often with energy dips after meals

That’s why improving insulin sensitivity can ease several PCOS symptoms at once.

It’s not just about weight

Insulin resistance is common in PCOS across all body sizes, though higher weight, especially around the waist, tends to make it stronger. Lean people with PCOS can also be insulin resistant, which is one reason “just lose weight” is unhelpful advice.

How doctors check

There isn’t a standard clinical test for insulin resistance itself. Instead, guidelines recommend screening for its effects on blood sugar:

• Oral glucose tolerance test (OGTT), the preferred test in PCOS: you drink a glucose solution and have blood drawn before and two hours after
• HbA1c, which reflects average blood sugar over about three months
• Fasting glucose

Because PCOS raises diabetes risk, these checks are recommended regularly, typically every one to three years depending on your other risk factors, and before or during pregnancy.

What improves insulin sensitivity

Move your body regularly

Working muscles take up glucose with less need for insulin. Both strength training and aerobic exercise help. General guidance for adults is at least 150 minutes of moderate activity a week (or 75 minutes of vigorous activity), plus muscle-strengthening on two days. Short walks after meals can soften blood sugar rises.

Build meals that release energy steadily

No single “PCOS diet” has been proven better than others. What helps most is a pattern you can keep:

• Pair carbohydrates with protein, healthy fat or fibre to slow how fast sugar enters the blood
• Favour whole grains, legumes, vegetables and fruit over refined carbohydrates and sugary drinks
• Many people find a protein-rich breakfast reduces cravings later in the day

Protect your sleep

Short or broken sleep worsens insulin resistance. Sleep apnoea is also more common in PCOS. If you snore loudly or wake unrefreshed, mention it to your doctor.

Consider medication with your doctor

Metformin improves insulin sensitivity and is often used alongside lifestyle changes in PCOS, particularly for people with higher weight or blood sugar concerns. Inositol supplements are popular too, though the evidence is still limited.

Small habits, tracked

Big overhauls rarely last. Small, repeatable habits do. Ovra’s daily plan focuses on six of them: a protein-first breakfast, 30 minutes of movement, meds and supplements, water, balanced meals and an earlier bedtime. It shows your consistency over time, so you can connect habits to how your cycles and symptoms change.

Sources

• NIH NIDDK, Insulin resistance & prediabetes
• 2023 International Evidence-based Guideline for the Assessment and Management of PCOS (Teede et al., J Clin Endocrinol Metab, 2023)
• WHO, Physical activity fact sheet

This article is general education, not medical advice. Check with your doctor before making medical decisions.