Ketogenic diets force the body to enter into a state called ketosis. The body generally makes use of carbohydrates as its primary source of energy. This owes to the fact that carbohydrates are the easiest for the body to absorb.
However, if the body runs out of carbohydrates, it reverts to making use of fats and protein for its energy production. Essentially, the body has a sort of energy hierarchy which it follows. You can search online to know about how to optimize your health and performance.
Image Source: Google
Secondly, it will go back to using fat as an alternative in the absence of an adequate supply of carbohydrates. Finally, the body will be turned into protein for energy supply when there is an extreme depletion of carbohydrate and fat stores.
However, breaking down protein for energy supply leads to a general loss of muscle mass. The ketogenic diet is not entirely dependent on calories in, calories out model. This is because the composition of the calories is important for the body's hormonal response to the different macronutrients.
However, there are two schools of thought in society keto. While one believes that the number of calories and fat intake did not care, others argue that calories and fat do not care. In the ketogenic diet, the most important factor of the composition of calories is a balance of fat, protein, and carbohydrates and how each affects insulin levels.