Lipid testing is an important clinical indicator for the diagnosis of many diseases, and the accuracy of the results may be affected by the interference of various factors in the process of lipid testing. When measuring lipids in the hospital, doctors usually require patients to have blood drawn on an empty stomach. Therefore, it is extremely important to have accurate lipid testing. What factors can affect the accuracy of lipid testing results? Diet is the most important factor that affects lipid testing. Lipid testing usually requires a 12-hour fast, and it is generally recommended to fast after dinner and not to eat any food other than water. The body should be in a stable metabolic state prior to the lipid test, and the test taker should maintain a regular diet and weight stability for at least 2 weeks. Patients should avoid excessive intake of high-fat, high-cholesterol and high-sugar foods four days before the blood test; patients should also refrain from drinking alcohol, tea, cola and coffee before the lipid test. Alcohol consumption can affect serum triglyceride levels in the blood, and in sensitive individuals, even moderate doses of alcohol can cause hypertriglyceridemia. Alcohol also increases the rate of lipid synthesis in the body, reduces the activity of lipoprotein esterase, and slows down the rate of triglyceride metabolism. Some studies have shown that certain diseases can also affect the level of lipid testing. Recent acute myocardial infarction, stroke, major trauma, and those taking certain medications that affect lipid levels can cause fluctuations in lipid levels, and those with these conditions should decide when to have their lipids measured under medical supervision. Women’s blood lipids may also increase during menstruation and pregnancy, and should be checked 3 months after delivery or termination of breastfeeding to reflect basic lipid levels. In addition, physiological conditions such as after intense exercise and severe mood swings can affect the results of lipid testing.