Summary
Can PCOS cause high cholesterol?
Yes. Polycystic Ovary Syndrome is strongly linked with insulin resistance, which can increase LDL (“bad”) cholesterol and triglycerides while lowering HDL (“good”) cholesterol. Research suggests many women with PCOS have an increased risk of dyslipidaemia and cardiovascular disease.
Why does PCOS affect cholesterol levels?
PCOS commonly affects how the body responds to insulin. When insulin resistance develops, the body produces higher insulin levels, which can disrupt fat metabolism and contribute to unhealthy cholesterol patterns, including elevated triglycerides and dense LDL particles.
What is the best diet for PCOS and high cholesterol?
A heart-healthy PCOS diet typically includes high-fibre foods, oats, vegetables, beans, healthy fats, oily fish and soya protein while limiting saturated fats and ultra-processed foods. Foods rich in soluble fibre and plant sterols may also help lower cholesterol naturally.
Can exercise improve cholesterol in women with PCOS?
Yes. Regular exercise may help improve insulin sensitivity, raise HDL cholesterol and support cardiovascular health in women with PCOS. Experts generally recommend at least 150 minutes of moderate-intensity exercise per week for long-term metabolic and heart health support.
If you've recently been diagnosed with Polycystic Ovary Syndrome (PCOS) - or you've been managing it for years - chances are you've already fallen down the internet rabbit hole of “conditions linked to PCOS.” Helpful? Sometimes. Mildly terrifying? Also, yes.
But while the statistics can feel overwhelming, understanding the science behind PCOS and its associated health risks gives you something powerful: the ability to act early, strategically and effectively.
One of the most common conditions linked with PCOS is high cholesterol. The encouraging news? High cholesterol - along with many of the long-term health effects associated with PCOS - is highly manageable with the right combination of medical support, nutrition, movement and lifestyle habits.
Think of it less as a doom-filled diagnosis and more as your body sending a slightly passive-aggressive email marked: “Action required.”
Understanding Cholesterol: The Fat That Isn't Always the Villain
High cholesterol is common across the general population, but research shows the risk rises significantly in women with PCOS. One study suggested that around 70% of women with PCOS are affected by dyslipidaemia - a condition involving unhealthy levels of lipids such as cholesterol and triglycerides in the blood (1).
Cholesterol itself isn't inherently bad. Your body actually needs it. Produced mainly by the liver, cholesterol helps make vitamin D, hormones and cell membranes. In other words, cholesterol is less “evil mastermind” and more “essential employee who occasionally causes chaos in the office.”
Problems begin when excess cholesterol builds up inside artery walls, leading to atherosclerosis - the narrowing and hardening of arteries. This reduces healthy blood flow and increases the risk of cardiovascular disease.
The reason high cholesterol is often called the “silent killer” is because it rarely causes symptoms. Many people only discover they have elevated cholesterol after a serious health event such as a heart attack, angina or stroke. High cholesterol is also linked with conditions including chronic kidney disease and peripheral vascular disease. Regular check-ups with your healthcare practitioner to have your cholesterol checked is good advice.
The PCOS–Insulin–Cholesterol Connection
So why exactly does PCOS increase the likelihood of high cholesterol?
Insulin is the hormone responsible for helping move glucose from your bloodstream into your cells for energy. With insulin resistance, your cells stop responding efficiently to insulin - a bit like ignoring repeated calendar invites from your pancreas.
To compensate, your pancreas produces more and more insulin. Over time, this can contribute to the development of Type 2 Diabetes if the body can no longer keep blood sugar levels under control.
Researchers have consistently observed that insulin resistance and type 2 diabetes are frequently associated with dyslipidaemia (3) - particularly:
- Higher triglyceride levels
- Lower levels of HDL (“good”) cholesterol (4)
- Increased levels of LDL (“bad”) cholesterol
HDL cholesterol helps remove excess LDL from the bloodstream, so maintaining higher HDL and lower LDL levels is ideal for cardiovascular health.
Scientists have also found that LDL particles in people with insulin resistance tend to be smaller and denser, which may further increase the risk of coronary heart disease (5). In cardiovascular science, tiny dense particles are basically the troublemakers of the cholesterol world.
How Cholesterol Is Tested in PCOS
Because PCOS is associated with increased cardiovascular risk, healthcare professionals will often monitor cholesterol levels routinely.
Testing usually involves a fasting blood test, meaning you'll typically avoid food and drink (except water) for around 10–12 hours beforehand. The blood sample is analysed to measure:
- LDL cholesterol
- HDL cholesterol
- Triglycerides
- Total cholesterol
If cholesterol levels are significantly raised, your GP may discuss treatments such as statins alongside lifestyle interventions.
But medication is only one part of the picture. Daily habits have a major influence on cholesterol levels - and small changes can produce measurable results.
How to Support Healthy Cholesterol Levels with PCOS
1. Prioritise Healthy Fats, Not “No Fat”
A diet high in saturated fats may contribute to raised cholesterol levels. Swapping foods such as processed meats, butter and full-fat dairy for healthier fats can support heart health.
Good options include:
- Olive oil
- Nuts and seeds
- Oily fish
- Avocados
- Lean protein sources
- Lower-fat dairy products
Cooking methods matter too. Grilling, steaming and baking are generally more heart-friendly than deep frying.
Olive oil, rich in monounsaturated fats, may help lower LDL cholesterol while preserving beneficial HDL levels.
2. Exercise: The Closest Thing We Have to a Metabolic Cheat Code
Regular physical activity is strongly associated with improved cholesterol balance and may help increase HDL cholesterol (6).
Current guidelines recommend at least 150 minutes of moderate-intensity exercise each week. Translation: enough movement to raise your heart rate and leave you slightly breathless but not dramatically auditioning for a survival documentary.
Effective options include:
- Brisk walking
- Cycling
- Swimming
- Strength training
- Dance workouts
- Pilates or yoga combined with cardio activity
Consistency matters more than perfection.
3. Can Plant Sterols Lower Cholesterol?
Plant sterols - naturally occurring compounds found in plants - may help reduce cholesterol absorption in the gut.
They're often added to products such as:
- Cholesterol-lowering yoghurt drinks
- Margarine spreads
- Fortified dairy alternatives
One of the best-known examples is beta-sitosterol.
4. Don't Underestimate Soya
According to heart health experts, soya foods are naturally low in saturated fat, while soya protein itself may actively help lower cholesterol.
Useful additions include:
- Tofu
- Edamame beans
- Soya milk
- Soya yoghurt
- Soya mince or chunks
Soya is also a helpful protein option for people aiming to improve insulin sensitivity and reduce reliance on highly processed foods.
5. Oats Deserve Their Reputation
Oats contain beta-glucan, a type of soluble fibre shown to help maintain healthy cholesterol levels.
Soluble fibre works by helping remove bile acids - which are made from cholesterol - from the body.
Simple ways to increase soluble fibre intake include:
- Porridge oats
- Oatcakes
- Oat bran
- Lentils
- Beans
- Fruits and vegetables
It turns out your nan's obsession with porridge may have been evidence-based all along.
6. Smoking and Cholesterol: A Bad Collaboration
Smoking lowers HDL (“good”) cholesterol and increases the likelihood of cholesterol sticking to artery walls.
For people with PCOS - who may already have elevated cardiovascular risk factors - quitting smoking can have substantial long-term benefits for heart and metabolic health.
Support is available through GPs, smoking cessation services and evidence-based quit programmes.
Key Takeaways
- Living with PCOS does not mean high cholesterol is inevitable - and it certainly doesn't mean cardiovascular problems are guaranteed.
- What PCOS does mean is that your body may require a more proactive approach to metabolic health. Understanding how insulin resistance, cholesterol and hormones interact allows you to make informed decisions long before serious problems develop.
- Science is increasingly clear on one thing: small, sustainable lifestyle changes genuinely matter. Your future heart, hormones and energy levels will likely thank you for them.
Disclaimer: This article offers informational advice and is not a substitute for professional medical care. While we strive for accuracy and up-to-date information, always consult your GP or healthcare professional before using supplements or alternative products, especially if you have existing medical conditions or are under medical supervision.
References:
- Legro, R.S., Kunselman, A.R., Dunaif, A. (2001). Prevalence and predictors of dyslipidemia in women with polycystic ovary syndrome. Am J Med. 1;111(8):607-13. Available online: https://www.ncbi.nlm.nih.gov/pubmed/11755503/
- Marshall, J.C., Dunaif, A. (2012). All Women With PCOS Should Be Treated For Insulin Resistance. Fertil Steril. 97(1); 18-22. Available online: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3277302/
- Pihlajamaki, J., et al. (2004). Insulin resistance is associated with increased cholesterol synthesis and decreased cholesterol absorption in normoglycemic men. J of Lip Res. Vol 45, 2004; 507-512. Available online: http://www.jlr.org/content/45/3/507.full.pdf
- Wild, R.A., Rizzo, M., Clifton, S., Carmina, E. (2011). Lipid levels in polycystic ovary syndrome: systematic review and meta-analysis. Fertil Steril. 1;95(3):1073-9.e1-11. Available online: https://www.ncbi.nlm.nih.gov/pubmed/21247558/
- Reaven, G.M. (1995). Pathophysiology of insulin resistance in human disease. Physiol Rev. 75(3):473-86. Available online: https://www.ncbi.nlm.nih.gov/pubmed/7624391
Toth, P.P. (2014). Insulin resistance, small LDL particles, and risk for atherosclerotic disease. Curr Vasc Pharmacol. 12(4):653-7. Available online: https://www.ncbi.nlm.nih.gov/pubmed/23627975 - Mann, S., Beedie, C., Jimenez, A. (2014). Differential Effects of Aerobic Exercise, Resistance Training and Combined Exercise Modalities on Cholesterol and the Lipid Profile: Review, Synthesis and Recommendations. Sports Med. 44(2): 211–221. Available online: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3906547/