Total Cholesterol (Serum)

Why It Matters for Your Health

Cholesterol is a waxy substance found in your blood, made by your liver and also obtained from foods like eggs, fatty meats, and dairy products. It’s essential for cell function but can become harmful if levels are too high. High cholesterol increases the risk of plaque buildup in your arteries, which can lead to heart disease or stroke. This test helps doctors monitor and manage your risk by checking your total cholesterol level along with other lipid components like HDL (good cholesterol) and triglycerides.

What to Expect During the Test

A blood sample is taken from a vein, usually in your arm, by a healthcare professional. You may feel a slight pinch, but it’s generally quick and painless. No special preparation is needed unless instructed by your doctor. The sample is sent to a lab where it’s analyzed to measure your total cholesterol concentration.

Common Causes of Abnormal Results

High cholesterol levels may be caused by factors like a diet high in saturated or trans fats, lack of physical activity, obesity, genetics, or certain medical conditions such as diabetes or hypothyroidism. Low cholesterol levels might be due to certain medications, liver disease, or malnutrition.

How Results Are Interpreted

Results are typically reported as a single number representing your total cholesterol concentration. While specific reference ranges vary by lab, doctors often use guidelines (like those from the American Heart Association) to interpret results in relation to your overall health. Your doctor will discuss your results with you and may recommend lifestyle changes, medications, or further testing if needed.