A typical lipid profile includes total cholesterol, triglycerides, HDL cholesterol, and which additional marker?

A typical lipid profile includes total cholesterol, triglycerides, HDL cholesterol, and which additional marker?

• A. Phospholipid
• B. LDL cholesterol
• C. Chylomicron
• D. VLDL cholesterol

Answer: (B)

The main idea here is understanding what completes a standard lipid profile beyond total cholesterol, triglycerides, and HDL cholesterol. The additional marker is LDL cholesterol. LDL carries most of the cholesterol in the blood and is the primary contributor to atherosclerosis, so its level is essential for assessing cardiovascular risk and guiding treatment. In many labs, LDL-C is calculated from total cholesterol, HDL-C, and triglycerides using the Friedewald equation (LDL-C ≈ Total cholesterol − HDL-C − (Triglycerides/5)) when triglycerides are below about 400 mg/dL and the test is fasting. Phospholipids, chylomicrons, and VLDL cholesterol aren’t typically reported as part of the routine lipid panel, though non-HDL cholesterol (total minus HDL) can be informative.

The main idea here is understanding what completes a standard lipid profile beyond total cholesterol, triglycerides, and HDL cholesterol. The additional marker is LDL cholesterol. LDL carries most of the cholesterol in the blood and is the primary contributor to atherosclerosis, so its level is essential for assessing cardiovascular risk and guiding treatment. In many labs, LDL-C is calculated from total cholesterol, HDL-C, and triglycerides using the Friedewald equation (LDL-C ≈ Total cholesterol − HDL-C − (Triglycerides/5)) when triglycerides are below about 400 mg/dL and the test is fasting. Phospholipids, chylomicrons, and VLDL cholesterol aren’t typically reported as part of the routine lipid panel, though non-HDL cholesterol (total minus HDL) can be informative.