Introduction There is a great majority of diets and nutrition systems developed all over the world. It seems that thousands of doctors and nutritionists give completely different recommendations on how to comply with excessive weight or balanced nutrition. Atkins diet was first presented in the United States in 1972. After thirteen years, its creator, Doctor Atkins, was recognized as a Man of the Year. This system includes both a diet and nutrition peculiarities. First, the diet is carried out as such, and then the patient should preserve a low-carb diet for a long time. The latter is recommended to preserve and consolidate the result. Atkins nutrition system advantages refer to the fact that a person does not have to starve and feel a constant irritation due to the inability to eat enough. As for the disadvantages, negative manifestations may occur during the uncontrolled conduct of the diet. Comparison of Atkins Diet with ABC-MV Adequacy Adequacy implies that a diet contains enough nutrients, fiber, and calories. To identify whether Atkins diet meets this characteristic, it is important to clarify the products allowed during the diet. Any sorts of meat are allowed in an unlimited amount, and the fatter, the more effective. It is expected that with the help of fats, a person will nourish the body. Seafood and eggs are also allowed as well as cabbage, cucumber, lettuce, and mushrooms. Among the forbidden products, there are absolutely all kinds of fruits, bread, and cereals, alcohol, sugar, fruits, and foods with high sugar. The consumption of onions, peas, sour cream, and tomatoes is limited (see Figure 1 for details). Figure 1. Atkins Diet (Vieira). Such an approach to nutrition cannot be called adequate due to the lack of a balanced intake of proteins, fats, and carbohydrates. This cannot have a positive effect on human health. For example, Atkins diet may provoke the appearance of stones in the kidney or gall bladder or increased the possibility of diabetes, thyroid problems, and cardiovascular system failure. Balance This characteristic means the balanced proportion of nutrients during the diet. Atkins diet states that the first two weeks is a reduction phase. In this period, one needs to reduce carbohydrate intake to twenty grams (for example, one apple contains about fifteen grams). Thus, the body receives energy not from carbohydrates as customary, but from fats and proteins to some extent, due to which the weight loss occurs. In the subsequent period, the number of carbohydrates maybe increase to one hundred grams. For comparison, modern medicine has proved that for normal functioning of the body, at least 400 grams of carbohydrates are needed daily (Wylie-Rosett et al. 275). Therefore, Atkins diet does not meet the criterion of balance. Calorie Control The proper selection of foods to control calorie intake is another characteristic of adequate dieting. Atkins diet encourages dieters to keep their usual rhythm of nutrition: the meals at the same hours as before the diet. If one starts to feel hungry, he or she can slightly snack between meals, but only allowed in the first phase of the diet. In other words, volume and calorie content of food are not limited. Since this diet aims at changing metabolism by the artificial decrease in the intake of carbohydrates into the body, fats become the only source of energy. As a result, it is possible to observe ketoacidosis – intensive decomposition of fats