Cholesterol plays a crucial role in cellular function, serving as a building block for cell membranes and precursor for steroid hormones. It's vital in synthesizing vitamin D and bile acids necessary for digestion. While the body produces cholesterol naturally, it can also be obtained from the diet. Balancing cholesterol levels is critical for maintaining cardiovascular health, as high levels of low-density lipoprotein (LDL) can increase the risk of heart disease. However, high-density lipoprotein (HDL) is beneficial, helping to remove excess cholesterol from the bloodstream.