HCG diet and weight loss program supervised by Dr. Anna Gravich. HCG diet is one of the most popular diets in America today. HCG is a natural hormone protein substance. HCG has become a preferred treatment for obesity and weight loss by physicians around the world. What is the reasoning behind this. In combination with a low calorie diet, HCG is believed to have safely speeded up weight loss using daily injections of HCG or sublingual pills, for 23-40 days in conjunction with a low 500 calorie diet. It targets the stored fat and spares lean muscle mass. Its believed to protect your bodies good fat and muscle from depleting while dieting.