First of all, I don't know what protein diet you are talking about. Do you eat protein instead of sugar and fat? This method is harmful to health. In principle, these three substances can be transformed into each other, but in fact, the conversion of sugar into lipid is the simplest method. Protein can only be denitrified into sugar under the condition of less energy supply from sugar in the body, so it has two shortcomings. If 1 denitrifies too much, it will increase the burden of its metabolic organ kidney. Protein becomes sugar, without proper nutrition. If you eat a lot of protein food and don't eat the other two, the energy released by protein is far less than the other two, which will trigger the most difficult way. The fat in the body releases energy to achieve the effect of losing weight. You can think of it this way. The three substances have their own functions to balance the steady state of the body, but you have to make all three substances work hard for the objective conditions of energy supply, so this is very harmful to health.