Separate diet (diet according to G. Shelton)
As you know, the essence of separate nutrition is that carbohydrates and proteins need to be taken separately. In the acidic environment of the stomach, only proteins are digested, carbohydrates are beginning to rot there. To ensure that they are digested in the alkaline environment of the small intestine, they need to eat separately. The concentration of hydrochloric acid in the stomach, in fact, makes rotting there impossible. Between the stomach and the small intestine is the duodenum, and it is in it that fats, proteins and carbohydrates are simultaneously digested. There are products containing all these components, for example legumes. The meat contains carbohydrates (glycogen), in the potato - vegetable protein. Separate nutrition does not exist at all. Different enzymes are isolated for digesting proteins. The load on the enzyme system, if fed on a separate system that is not used, is reduced. She loses her ability to work. Therefore, those who use a separate diet for a long time can not return to normal nutrition in the future. As you can see, this kind of health can be harmed.
Fasting (diet according to P. Bregg)
The essence of this diet is extremely simple. It consists in the fact that the cleansing and losing weight of the body is supposed to happen with the help of partial or total refusal of food. Nerve cells actually live only when a constant level of sugar in the blood is maintained. Neurons die without a constant intake of sugar in the form of glucose into the body. Therefore, many people who lose weight often have a bad mood. When a person does not eat at all, protein, fats and carbohydrates are replenished from the reserves of our body. If the fasting lasts more than a day, then the body makes up for the lack of glucose from the connective tissue and skeletal muscles. Weight begins to decrease not only due to the splitting of fat, but also because of the breakdown of muscle tissue. In place of the destroyed proteins (muscles), fat tissue grows. And even more! As a result, the human body believes that hunger is approaching - a harbinger of unfavorable conditions. And so the tissues are stored with additional energy in the form of fat deposits. With purulent inflammation, allergies, in general, with various pathologies, you can use therapeutic starvation. But for the so-called recovery and purification of the body, it is contraindicated - you can seriously damage your health.
The Kremlin diet
The essence of the "Kremlin" diet, limiting the use of carbohydrates, give preference to proteins. Almost guaranteed excess protein for food leads to a dangerous dysbacteriosis. Bacteria of the large intestine, contrary to popular belief, exist due to the incoming substrate. If mainly carbohydrates pass through the digestive tube to the large intestine, useful fermentation bacteria develop. When only proteins reach, there will be a high probability of the predominance of putrefactive processes - this is dysbiosis. And in this case it is possible to harm a diet.
Cholesterol diet
With a "cholesterol-free" diet, a person refuses to eat fatty foods, in which there is a lot of cholesterol. In excess, cholesterol harms the blood vessels. In fact, for centuries people have been feeding, and there are simply no defatted products in it. Cholesterol, which is part of cell membranes, provides the possibility of cell division. They represent a modified cholesterol and sex hormones. Part of the modified cholesterol comes with fatty foods (it's not for nothing that they say that a man needs to be fed with meat). This diet provokes an early menopause. The modern science can not say exactly and that atherosclerosis is manifested from excess cholesterol. In general, and such a diet can not be called useful.
The Montignac Diet
The essence of the diet "by M. Montignac" - is a conscious restriction in tasty food for the sake of not very tasty, but useful. In other words, this is a rejection of digestible carbohydrates. In fact, to feed nerve cells a person needs digestible carbohydrates (glucose). When nerve cells suffer from a lack of nutrition, then there are changes in the work of the brain. Some nutritionists try to convince us that all the most delicious (spicy, salty, spicy) is harmful to health. But because of what then does our body require just this? The central nervous system gives the first command to start digestion. Aesthetic appearance of tasty food and pleasant smells stimulate the secretion of gastric juice and saliva. When the food is not tasty, how useful it was not, it will not be fully digested - because the body does not receive signals about its processing. In the end, what would you not eat, food always turns into chyme - a lump formed from food inside the digestive tract. It is approximately the same in composition of amino acids, fat and other constituents. And poorly digested. With such a diet, digestive problems can not be avoided.
Now you decide whether it is possible to damage your health with diets. Before you go on a diet, consult a doctor so that your weight does not decrease with excess weight.