Cholesterol - Cholesterol is a waxy steroid metabolite found in the cell membranes and transported in the blood plasma of all animals. It can be categories into two major group 1. LDL - Low density lipoprotein (Bad Cholesterol) 2. HDL - High density lipoprotein (Good Cholesterol) The LDL - the bad cholesterol will caused heart attacks, strokes, and other serious medical problems.