This document discusses cholesterol, including what it is, how it moves through the bloodstream, where it is found in foods, and its significance in the body. Cholesterol has several important functions, including cell growth and tissue repair, building cell membranes, and producing hormones and vitamin D. High cholesterol can be caused by diet, weight, lack of exercise, smoking, diabetes, and obesity. A high cholesterol level can lead to complications like heart attacks and strokes by causing a buildup of plaque in the arteries. Dietary tips to avoid high cholesterol include eating whole grains, foods high in omega-3 fatty acids, and limiting saturated fats and fried foods.