If you are 20 or older, you should check your cholesterol level at least once every 5 years as a regular check-up. It's desirable to have your cholesterol numbers within the desirable range. Levels in between are considered borderline high.
Cholesterol Numbers / levels - Desirable
Total Cholesterol
LDL Cholesterol
HDL Cholesterol
Triglycerides
Source: National Cholesterol Education Program NCEP
Message: To treat high blood cholesterol, the National Cholesterol Education Program NCEP now recommends the TLC diet. In any case, your doctor may prescribe medications immediately if the LDL cholesterol level is over 160 mg/dL or 4.1 mmol/L.