The foundational theory to all "Metabolic Typing Diets" is wrong because all humans are essentially carnivorous with the ability to remove excessive glucose from the blood by using it for energy or storing it as body fat. The human body operates in a much more healthy manner burning fat, not glucose. Carbohydrates are converted to blood glucose for a quick burst of energy but at the expense of causing future "age related" diseases as described in my carbohohydrate study at the beginning of this thread. Dr. Lutz and Allen describe carbohydates as pathogenic in their book, Life Without Bread, even though they suggest a diet with a maximum level of 72 grams of carbs. Dr. Lutz appears to have not done any research at lower carb levels.

The Second Opinion web site has a very good study that shows human physiology is much more like a carnivous wolf than a herbivorous sheet or cow.

Second Opinions by Barry Groves, PhD.

"The design of our digestive organs and digestive enzymes today shows that mankind is basically a carnivorous (meat eating) species with the ability to digest carbohydrates from fruit and vegetables. Health is damaged by the consumption of these carbohydrates in ratio to the percentage ingested."

7,700-Year-Old Woman Who Ate Like A Wolf.

Kent