Bestcol 5 mg Tablet is a statin medication containing Rosuvastatin Calcium, a selective and competitive inhibitor of HMG-CoA reductase. This enzyme is crucial in the biosynthesis of cholesterol. By inhibiting this enzyme, Rosuvastatin effectively lowers levels of total cholesterol, LDL-C (low-density lipoprotein cholesterol), ApoB, non-HDL-C, and triglycerides, while increasing HDL-C (high-density lipoprotein cholesterol) levels.