A healthy range for cholesterol levels in adults generally falls below 200 mg/dL for total cholesterol. Specifically, low-density lipoprotein (LDL) should be less than 100 mg/dL, whereas high-density lipoprotein (HDL) should ideally be above 60 mg/dL. Managing cholesterol levels is crucial for reducing the risk of heart disease and stroke. Regular monitoring of these levels through blood tests is recommended to ensure optimal cardiovascular health.