Everyone needs three nutrients for normal growth and development, namely protein, fat and carbohydrate, among which lipids mainly include triglycerides, phospholipids and sterols, while cholesterol is one of the sterols and the most important one. It is an important part of cell membrane and plays an important role in maintaining normal cell function. Cholesterol is an indispensable raw material for maintaining normal metabolism, an important substance for anti-aging and prolonging life, and also an important raw material for various hormones in the body, such as steroid hormones, vitamin D, bile acids and so on. It can be said that cells can not do without cholesterol, and the body can not do without cholesterol. Once there is no cholesterol in the human body, not only health and longevity are impossible to talk about, but even the normal physiological metabolism and life process of the human body cannot be maintained.

Although cholesterol is an integral part of the cell membrane of higher eukaryotic cells and is necessary for cell growth and development, high cholesterol content in serum will accumulate on the wall of coronary artery and cause coronary heart disease.