Cholesterol is a waxy, fat-like substance found in every cell of the body. It plays a crucial role in producing hormones, vitamin D, and substances that help digest food. While our bodies need some cholesterol to function properly, too much can lead to health problems, particularly related to the heart and blood vessels. There are two main types of cholesterol: LDL (low-density lipoprotein), often referred to as "bad" cholesterol, and HDL (high-density lipoprotein), known as "good" cholesterol. High levels of LDL can lead to plaque buildup in arteries, increasing the risk of heart disease and stroke. Maintaining a healthy balance of these types is essential for overall health.