Cholesterol is a fat that, when taken in adequate quantities, is useful for the body. It only becomes dangerous when we produce it or eat too much.
An excessive amount of cholesterol (hypercholesterolemia) in the blood (LDL) causes the formation of inflamed atherosclerotic plaques, which occupy space, are covered with clots, which fragment and release emboli that cause cardiovascular diseases: heart attack, stroke, arteriopathy.
In addition, cholesterol is very good at teaming up with other enemies of our health: smoking, stress, diabetes, high blood pressure. It creates a powerful synergy that can significantly worsen our lives if we do not fight it promptly.