When performing lipid tests, blood lipids are significantly elevated after eating and the test results are inaccurate. Lipid tests generally include four main components: cholesterol, triglycerides, HDL and LDL. Eating will lead to a significant increase in triglycerides, and the concentration of blood lipids peaks 2 to 4 hours after a meal, so the test results are inaccurate at this time and should be performed on an empty stomach. Fasting is required for lipid testing, but there are also requirements for the duration of fasting, as too long a period of fasting may result in fat mobilization, i.e., the body’s fats begin to break down in order to maintain the body’s needs, which can also lead to elevated results. Fasting time is about 10 hours, i.e. avoid eating after 10 pm the night before the test.