This Deep Dive tries to explain that cholesterol is a waxy substance found throughout the body, necessary for cell building but problematic in excess. It notes that the body produces cholesterol, but some comes from animal-based foods and tropical oils high in certain fats. The source emphasizes that high cholesterol increases the risk of cardiovascular diseases, like heart attack and stroke, by contributing to artery-narrowing atherosclerosis. Therefore, it advises individuals to check their cholesterol levels, make dietary and lifestyle changes, and seek professional help if needed to control cholesterol, especially if other risk factors are present.