About HDL Cholesterol
HDL ('good') cholesterol acts as a reverse-transport system, collecting excess cholesterol from artery walls and returning it to the liver for excretion. Higher HDL is independently protective against cardiovascular disease, while low HDL — even with otherwise normal cholesterol numbers — is a significant independent risk factor. Regular aerobic exercise, quitting smoking, and reducing refined carbohydrates are the most evidence-backed ways to raise HDL.