Overweight is a hefty problem in the United States. It's estimated that 24 percent of men and 27 percent of women in this country about 34 million adult Americans are obese. And sometimes it seems that there are 34 million different diets or diet products promoted to combat the problem. The latest to win the nation's fervent attention is a revival of a sort return to very low calorie diets, generally 400 to 800 calories per day.
Very low calorie, or modified fasting, diets, as they are sometimes called, are not a new concept. Protein formula products (either liquid or powdered) were popular more than a decade ago until serious health effects including several deaths dampened the public's enthusiasm and led to new federal requirements for labeling of these products