apelike ancestors, like today’s great anthropoid apes, were essentially vegetarians, even if, occasionally, certain apes hunted other animals for food. Indeed, it was by becoming group hunters and meat eaters that humans were able to acquire uniquely human faculties. The human body possesses a whole system for digestion and elimination that still allows us today to eat unlimited quantities of meat and fish.
We are designed to eat meat, fish, and poultry, as far as both our metabolism and psychology are concerned. Yes, it is possible to live without hunting and without eating meat, but by doing so we give up a part of what our nature expects, and we lessen the emotional effect our body is programmed to produce when we give it what it expects. What I am saying to you here may seem trivial, but it is absolutely crucial, as the purpose of any living creature, whether animal or human, is to live in such a way that what it does fits with why it has been made that way.
Digestion, Calorie Loss, and Satisfaction
Of all the food categories, the digestion of proteins is the most time consuming. It takes over three hours to break down and assimilate proteins.The reason for this is simple: protein molecules are long chains with well-soldered links, and to break down their resistance requires the combination of good chewing and the simultaneous attack of various gastric, pancreatic, and biliary juices.
This long process of calorie extraction taxes the system; it has been calculated that to obtain 100 calories from a protein food, the system must use 30 calories. We can say that the specific dynamic action of proteins is 30 percent, while it is only 12 percent for fats and just 7 percent for carbohydrates.
What we should remember from this is that when someone wanting to lose weight consumes meat, fish, or nonfat yogurt, the person has to work hard to simply digest and assimilate the food, and the calories they use doing this reduces the energy absorbed from the meal. This really works in the favor of anyone wanting to lose weight. We will explore this process at greater length when we explain how the pure protein diet works. What is more, this slow rate of digestion and assimilation delays the process of emptying the stomach and increases our sense of “feeling full” and our sense of satisfaction.
The Only Vital and Indispensable Nutrient at Every Meal
Of the three universal food groups, only proteins are indispensable for our existence. Carbohydrates are the least necessary nutrient, because our bodies can produce glucose—that is, sugar—from meat or fat. When we are deprived of food or are dieting, we draw upon our fat reserves, transforming them into the glucose that is vital for our muscles and brain. The same goes for fats: an overweight person is expert in both making and storing them.
On the other hand, we do not have the metabolic means to synthesize proteins. Just being alive and ensuring that our muscular system is maintained, that our red blood cells are renewed, that wounds heal, that hair grows, and even that memory functions—all these vital operations require proteins, a minimum of 1 gram per day for every 2 pounds of body weight.
Whenever there is not enough protein, the body is forced to drawupon its reserves, mainly the muscles, but it also uses skin or even bones. This is what happens when unreasonable diets are followed, such as juice fasts or the Beverly Hills Diet, which allows unlimited quantities of exotic fruits.
Recently, some diets have led people to believe that our bodies can be detoxified by eating just fruit and vegetables for a few days. When you realize it has been scientifically proved that after eight hours without good-quality proteins, the body has to draw upon its own muscle reserves to ensure its vital functions, you can understand just how inappropriate such ideas are.
Anyone wanting to lose weight should therefore realize that however restrictive the diet, it should never supply the