Optimal low-density lipoprotein cholesterol levels are under 100, and patients with heart disease should aim for levels under 70, according to Cleveland Clinic. Ideal high-density lipoprotein cholesterol levels are 60 or above. Normal triglyceride levels are under 150.
Adults over the age of 20 should undergo cholesterol screening at least once every five years, states Cleveland Clinic. To improve cholesterol levels, individuals should limit consumption of saturated fat and trans fat, lose excess body fat, and engage in at least 30 minutes of exercise on most days. Cholesterol levels tend to increase with age, and, prior to menopause, women tend to have lower total cholesterol levels than men.