Watch when your body raises its own cholesterol, and you will see what it is for.
It goes up in pregnancy. By the third trimester a woman's cholesterol has risen 30 to 50%, because she is building a brain, a liver and a set of glands out of it, and the body does not wait for permission.
It goes up in a breastfed baby. Higher than in a formula-fed one, on purpose, because the milk is loaded with it and the brain is doubling in a year.
It goes up at puberty, when the testes and ovaries open for business and need the raw material for everything they make.
It goes up in winter, every year, in every population measured, because the sun is gone and the skin needs more of it on hand to make what vitamin D it can.
It goes up after the menopause, when the ovaries stop using it, and the body keeps the shelf stocked.
It goes up when you are injured, at the wound, to close it.
And it goes down when you are dying. In sepsis, in cancer, in the starving and the frail, cholesterol falls, and the lower it falls the sooner the end.
Up when building. Up when defending. Up when the light goes. Down when the body has given up.
The guideline reads the number and calls up a disease and down a success.
Your body has been raising it, on purpose, at every important moment of your life, and the tablet is a vote against all of them.