The short answer
Stress can raise your cholesterol a little, but for most people its biggest effect is indirect: through comfort eating, drinking more, moving less, sleeping badly and smoking. Cholesterol rises briefly during stressful moments, and long-term stress has been linked to higher triglycerides and lower HDL. The evidence that everyday stress on its own pushes LDL up is limited. The exception is very high cortisol, from Cushing's syndrome or steroid medicines, which does raise LDL.
General information, not medical advice
If your cholesterol is high, don't assume stress is the cause. Ask your doctor to check the usual suspects first. If you take steroid tablets, don't stop them without medical advice. If you're struggling with stress, anxiety or low mood, your GP or doctor can help.
Are cortisol and cholesterol the same thing?
No. Cholesterol is a fatty substance carried in your blood by lipoproteins such as LDL and HDL. Your body uses it to build cell membranes and to make hormones. Cortisol is one of those hormones: a steroid hormone that your adrenal glands make from cholesterol, and release in larger amounts when you're under stress.
So they're chemically related, but they're different things, measured by different tests. A cholesterol test doesn't measure cortisol, and a high cortisol level doesn't mean high cholesterol, or the other way round.
What the research shows
| Study | What it found |
|---|---|
| Short-term mental stress (199 middle-aged adults) | Total, LDL and HDL cholesterol all rose after stressful tasks in the lab. People with the biggest rises had higher LDL and a higher chance of clinically raised cholesterol three years later, even after allowing for their starting levels. |
| Shift work (66 studies, 197,063 workers) | Shift workers had slightly higher triglycerides and lower HDL. Permanent night workers also had higher total cholesterol. No significant difference in LDL. |
| Work stress in police officers (234 officers, 5 years) | The most stressed quarter had higher triglycerides and lower HDL, and a higher risk of metabolic syndrome, than the least stressed. |
| Review of 39 long-term studies | Chronic stress was generally linked to metabolic syndrome, but there were too few studies to draw a firm conclusion about cholesterol, though the trend was towards a link. |
Put together, stress is more clearly linked to the triglyceride and HDL side of the lipid panel than to LDL. Triglycerides of 150 mg/dL (1.7 mmol/L) or more count as high; the NHS suggests HDL above 1.0 mmol/L (39 mg/dL) for men and 1.2 mmol/L (46 mg/dL) for women. Most of these studies are observational, so they can't prove stress itself is the cause.
How stress could affect your cholesterol
- Through habits, mainly. The American Heart Association lists the ways stress feeds into heart risk: smoking, overeating, an unhealthy diet, too little activity, weight gain and not taking medicines as prescribed. Stress also disrupts sleep. Biscuits at your desk, takeaways and an extra drink in the evening add up to more saturated fat, sugar and alcohol, which raise LDL and triglycerides.
- Through stress hormones. During stress your body releases hormones such as adrenaline and cortisol. That may be part of why blood lipids rise in the short term in lab studies, though the exact mechanism isn't settled.
- Through very high cortisol. The 2026 ACC/AHA cholesterol guideline lists Cushing's syndrome (the body making too much cortisol) and glucocorticoid medicines such as prednisolone among the secondary causes of high LDL. Everyday stress doesn't raise cortisol to anywhere near those levels.
What helps
- Rule out the bigger causes first. Diet, weight, inactivity, alcohol, an underactive thyroid, diabetes, kidney or liver disease, some medicines and genetics all affect cholesterol more reliably than stress. Our guide to what to do when your doctor says your cholesterol is high walks through the checks and a 30-day plan.
- Watch what stress does to your eating. Log your food through a stressful week and a calm one and compare. If stress means more cheese, pastries or takeaways, plan easy swaps: our low-cholesterol snacks, heart-healthy desserts and 100 cholesterol-lowering food swaps help, and our guide to how much saturated fat per day gives you a target.
- Move, because it does double duty. Regular exercise relieves stress and improves your lipids. The NHS recommends at least 150 minutes of moderate activity a week. See what actually raises HDL.
- Protect your sleep. The AHA suggests seven to nine hours a night for adults. The 2026 guideline includes healthy sleep and stress management alongside diet, activity, weight and avoiding tobacco in its lifelong recommendations to prevent high cholesterol.
- Use the stress tools that work for you: time with friends and family, relaxation or meditation, time outdoors, a hobby, or support from a professional.
- If you work nights, keep an eye on triglycerides and HDL as well as LDL, and plan meals for your shifts rather than relying on vending machines.
Then check whether it's working. Compare your next lipid panel with your last; our guide to reading your cholesterol test results explains each number in mg/dL and mmol/L. To see food and results side by side, our roundup of the best cholesterol tracking apps compares the options.
See what stressful weeks do to your diet
Heart Tracker logs meals by barcode, search or voice and adds up saturated fat, so you can compare a stressful week with a calm one and spot the habits that creep in. Log each lipid panel to see whether the changes show up in your numbers. Free, with no account needed.
Download Heart Tracker FreeStress and cholesterol: quick answers
Can stress raise your cholesterol?
A little. Cholesterol rises briefly during stressful moments, and long-term stress and shift work are linked to higher triglycerides and lower HDL. Most of stress's effect on cholesterol comes through habits such as comfort eating, drinking more, moving less and smoking.
Are cortisol and cholesterol the same thing?
No. Cholesterol is a fatty substance carried in the blood by LDL and HDL. Cortisol is a stress hormone that the adrenal glands make from cholesterol. They're chemically related but measured by different tests.
Does cortisol raise cholesterol?
Very high cortisol does. The 2026 ACC/AHA guideline lists Cushing's syndrome and steroid (glucocorticoid) medicines among the secondary causes of high LDL. The cortisol rises from everyday stress are much smaller, and their effect on cholesterol is unclear.
Can anxiety cause high cholesterol?
Anxiety on its own isn't an established cause of high LDL. It can affect cholesterol indirectly through sleep, eating, drinking, smoking and activity, and the American Heart Association links negative mental health with higher heart risk. If anxiety is affecting your daily life, talk to your doctor.
Can stress affect a cholesterol test result?
Possibly slightly: lab studies show blood lipids rise briefly during acute mental stress. The NHS also notes that recent illness and some medicines can make levels higher or lower. If a result is unexpected, ask whether to repeat it.
Will reducing stress lower my cholesterol?
On its own, probably only modestly, and it hasn't been well tested. But stress management makes the changes that do lower LDL easier, like eating less saturated fat, exercising, drinking less and sleeping better. The 2026 guideline includes stress management in its lifestyle advice.
Sources
- Steptoe A, et al. Associations between acute lipid stress responses and fasting lipid levels 3 years later. Health Psychology. November 2005.
- Dutheil F, et al. Shift work, and particularly permanent night shifts, promote dyslipidaemia: a systematic review and meta-analysis. Atherosclerosis. 2020;313:156–169.
- Garbarino S, Magnavita N. Work stress and metabolic syndrome in police officers: a prospective study. PLOS ONE. 2015;10(12):e0144318.
- Bergmann N, Gyntelberg F, Faber J. The appraisal of chronic stress and the development of the metabolic syndrome: a systematic review of prospective cohort studies. Endocrine Connections. 2014;3(2):R55–R80.
- StatPearls: Physiology, Cortisol (NCBI Bookshelf, updated December 2025)
- 2026 ACC/AHA/multisociety Guideline on the Management of Dyslipidemia. Journal of the American College of Cardiology. March 2026. (Secondary causes of high LDL, Table 15; primordial prevention.)
- American Heart Association: Stress and heart health (reviewed February 2024)
- NHS: Cholesterol levels (reviewed March 2026)