let's ask our guest andrey maryanovich. hello.rey maryanovich pristrom cardiologist professor doctor of medical sciences head of the department of cardiology and rheumatology of the belarusian medical academy of postgraduate education member of the belarusian national society of cardiology member of the european society of cardiology author of eight patents for an invention in belarus author of more than 350 publications. let's start with, in general, why do we need kl cholesterol, the main function in our body. without him all our cells are built, that is, it is very important, plus a huge amount of hormones . formation also has its basis, therefore, our body is needed. so we synthesize, that is, we produce most of the time and only a small part, but about 20% of it comes from food, it can be bad and good. let's deal with the bad and, most importantly, with the density of cholesterol cholesterol, it is the same, and the density is those transport systems that deliver it either for processing for destruction, or on the contrary, s