Cholesterol is a type of lipid (fat). It’s a waxy, fat-like substance that your liver produces naturally. It’s vital for the formation of cell membranes, certain hormones, and vitamin D.
Only a small amount of cholesterol comes from your diet, most is made in your liver. If you have an inherited predisposition for high cholesterol levels or if you eat too much of the foods that are high in cholesterol, saturated fats and trans fats, then levels of cholesterol in your blood may increase and have a negative impact on your health. The two major forms of cholesterol are low-density lipoprotein (LDL) and high-density lipoprotein (HDL). If your blood contains too much LDL cholesterol, it’s known as high cholesterol. When left untreated, high cholesterol can lead to many health problems, including heart attack or stroke.