Cholesterol IQTotal Cholesterol Cholesterol is a waxy substance found in all cells in your body. Your body needs small amounts for many reasons; from helping to make vitamin D to digesting fats. However, high levels can increase your risk of heart disease so its important to get the right balance. HDL (High Density Lipoprotein) Typically referred to as "good cholesterol", high density lipoprotein (HDL) helps to remove "bad cholesterol" from your bloodstream and