Cholesterol is a derivative cyclopentaperhydrophenanthrene, produced inside the body or obtained from food of animal origin (such as meat, seafood, meat offal, fats, meats and egg yolk). Individual fractions of cholesterol have different effects on the human body. It is used for the production of compounds of high biological activity (bile acids, steroid hormones, vitamin D3), it is a building substance of cell membranes. The concepts of "bad cholesterol" (LDL - containing lipoproteins low value) and "good cholesterol" (HDL - high-density lipoproteins) are the conventional terms. There is only one cholesterol. Fractions are transported by proteins, that carry them into the blood vessel walls (LDL) or the liver (HDL). The specific levels of cholesterol fraction defines the so-called. lipid profile, which, properly regulated by the food, should not cause a disturbance in the LDL - HDL relation.