What is a calorie deficit?

A calorie deficit represents a fundamental physiological state of the body in which the amount of energy entering with food is less than the volume of energy that the body expends on maintaining vital activity, thermoregulation, and physical activity. This is the basic and only scientifically proven biological law that makes the weight loss process possible regardless of the chosen nutrition system, whether it is keto, intermittent fasting, or veganism. Without creating this deficit, the loss of fat mass is physically impossible, as the body will not expend its internal strategic reserves.

In order to competently and safely implement this principle into your life, you need to perform a certain sequence of actions.

Observing a moderate deficit allows you to lose weight without severe stress on the endocrine system, preserving muscle mass and good well-being. The main rule here is not to drop below the basal metabolic rate level, otherwise the body will begin to destroy muscles and slow down metabolic processes instead of burning fat.