When Is It an Eating Disorder? If you're overweight, trying to shed unwanted pounds is certainly a step toward improving your health. But for people who suffer from an eating disorder, the desire to lose weight is an unhealthy obsession. Learn about the symptoms of anorexia and bulimia. Advice on Heart Disease Prevention "What is your best advice when it comes to heart disease prevention?" Get the answer from Dr. Agatston. SouthBeachDiet.com is part of the Everyday Health Network. The Lowdown on Cholesterol You may wonder why, if cholesterol is so bad for you, it is present in your body in the first place. The answer is that cholesterol is not all bad and is, in fact, necessary for life. Your liver manufactures cholesterol for a reason: It is essential for the production of cell membranes and sex hormones, such as estrogen and testosterone. Visit the Heart Health Center on Everyday Health and learn more from Dr. Agatston.