Dear Oleg, How I wish I could be in your shoes! I think it is great that you only get out a few stones and are clean.

I think that your liver is supposed to make cholesterol and that it uses this substance to wrap up certain things to be disposed of later. At least that is what I understand. The more one exercises and stays in good shape the better the liver functions at doing this.
Now then whether or not these wrapped substances are supposed to stay in your liver is another matter. I don't think they are.

I'm no doctor and maybe someone here has better information to help you with.