Science is not just science, but also politics. Take for instance the recommended food pyramid, which is a concoction collaborated by the many lobbyist boards from around the nation. The pig, beef, poultry, sugar, wheat, soybean, corn, etc lobby groups. The recommended intake of food is nothing more than politics and nothing to do with science. Check Marion Nestle's book on Food Politics
Professor J - The problem of weight is not a two dimensional issue. People don't get fat from just eating too many calories and not enough exercise. This is two dimensional thinking. What about the genetically modified foods that act as foreign substances in the body, making them more difficult to process. All corn, wheat and soy are genetically modified. What about the pesticides that are sprayed on the foods we eat that when in the body's system reek havok on the body's functioning. What about the fact that all foods grown today are nutrient deficient - only grown with potassium, nitrogen, and phosphorus. What about the other minerals that are needed for proper body functioning. Don't forget about the thousands of additives in foods like aspartame, msg, high fructose corn syrup and others. Then, there is the spraying of chemicals in the air like barium, aluminum and others. Oh, let's not forget the water additives like fluoride which is mixed with radioactive materials.
So you can point out all the medical literature which has been funded by the mega corporations (big Pharma) at their funded Universities, published in their owned magazines and journals and say that science is just science. You can go on deluding yourself as long as you want. Nearly 800,000 people die as a result of the Medical Mafia each year according to Dr. Carolyn Dean in her book Death By Modern Medicine.