Because of its reputation as a risk factor for heart disease, people tend to think of cholesterol only in negative terms. But cholesterol is an important component of cell membranes and is vital to the structure and function of all your body's cells.
Cholesterol also is a building block in the formation of certain types of hormones.
If you're one of these people with this largely preventable condition, you may be on your way to heart disease. Over time, plaques narrow arteries, impeding blood flow and creating a condition called atherosclerosis. This puts you at increased risk of a heart attack. Likewise, decreased blood flow to your brain can cause a stroke, and less blood flowing to your lower limbs may result in gangrene. Food and Nutrition Center Signs and Symptoms High blood cholesterol doesn't cause any signs or symptoms.