Which lifestyle factors change HDL?

HDL cholesterol (high-density lipoprotein) is often called 'good' cholesterol because it transports excess cholesterol to the liver, protecting against atherosclerosis. Multiple lifestyle factors reliably influence HDL levels. Aerobic exercise is one of the most effective: regular endurance training can raise HDL by 5–10%. Dietary choices matter: unsaturated fats (olive oil, nuts, avocado) and omega-3 fatty acids (fish, flaxseed) are associated with higher HDL. Moderate alcohol consumption (e.g., one glass of red wine daily) shows a positive association in observational studies, but risks (cancer, liver disease) must be weighed. Smoking significantly lowers HDL; cessation can restore levels. Obesity and physical inactivity are strong negative factors. High intake of refined carbohydrates and sugars can reduce HDL. Individual genetic variation also plays a role. An HDL below 40 mg/dL (men) or 50 mg/dL (women) is considered a risk factor. Importantly, lifestyle-induced HDL changes are modest; statins have a smaller effect on HDL than on LDL. The evidence is strong, based on large epidemiological and interventional studies. However, HDL should not be viewed in isolation – the full lipid profile (LDL, triglycerides, inflammatory markers) is more informative for cardiovascular risk assessment.