What are total cholesterol and triglycerides?

In general, total cholesterol refers to the cholesterol contained in various lipoproteins in the serum, while triglycerides are an organic compound. Specific details are as follows:

Total cholesterol generally represents the sum of cholesterol carried by different lipoproteins in the serum, including both esterified and free cholesterol. It cannot usually serve as an accurate standalone indicator for assessing the risk of atherosclerosis. The normal reference range for total cholesterol is 2.83–5.20 mmol/L. Elevated levels may be associated with conditions such as hyperlipoproteinemia, atherosclerosis, diabetes, hypothyroidism, and nephrotic syndrome. Decreased levels may be linked to severe anemia, acute infections, hyperthyroidism, tuberculosis, cirrhosis, and other diseases.

Triglycerides are typically organic compounds formed by the esterification of the three hydroxyl groups of glycerol with three fatty acid molecules. Stored in the body in a non-hydrated form, they represent the largest energy reserve and the most abundant source of stored energy in the body. During moderate- to low-intensity exercise, the breakdown of triglycerides provides most of the energy required for muscle activity. The normal reference range for serum triglycerides is 0.45–1.69 mmol/L. Elevated levels may be associated with hypertriglyceridemia, diabetes, hypothyroidism, nephrotic syndrome, pancreatitis, and other conditions. Reduced levels may occur in cases of malnutrition, hyperthyroidism, adrenal cortical insufficiency, chronic obstructive pulmonary disease, cerebral infarction, and other diseases.

Patients are advised to seek timely medical attention when experiencing discomfort and to receive standardized treatment under the guidance of a physician, which can help promote recovery.