Cholesterol is a waxy, fat-like substance present in every cell of the body and is vital for various physiological functions. It plays a crucial role in building cell membranes, synthesizing hormones (such as estrogen and testosterone), and aiding in the production of vitamin D. Cholesterol travels through the bloodstream in lipoproteins, categorized as high-density lipoprotein (HDL) and low-density lipoprotein (LDL). LDL cholesterol, often termed as "bad" cholesterol, can build up in the arteries, forming plaques that narrow and block blood flow, increasing the risk of heart disease and stroke. In contrast, HDL cholesterol, known as "good" cholesterol, helps remove LDL cholesterol from the bloodstream, thereby reducing the risk of heart disease. Several factors, including genetics, diet high in saturated and trans fats, lack of exercise, obesity, and certain health conditions, can influence cholesterol levels. Monitoring cholesterol through regular blood tests and adopting a healthy lifestyle, including a balanced diet and regular exercise, is essential in managing cholesterol levels and reducing the risk of cardiovascular diseases.