A high level of LDL, the bad cholesterol, is the biggest threat to your heart -- although the other numbers are important, too. Bad cholesterol can clog your arteries and lead to a heart attack or stroke.
Lower tends to be better for LDL, though your personal goal depends on your heart risk. Diabetes, middle age, or family heart troubles can all raise your risk.
Aim for these LDL levels:
- Below 130 mg/dL for most people
- Below 100 if you're at risk of heart disease
- Below 70 if you're at very high risk