Energy or Calorie Balance
The energy or calorie balance in the human body is defined as the balance between energy intake and consumption. We can have a positive balance when the calories we take in are more than we consume, a negative when the opposite happens, while we say that we are in energy balance when these calories we take and the one we consume are equal. Kilocalorie is the energy currency of our metabolism. Our body tends to maintain, as much as possible, an energy balance due to homeostatic regulation. Metabolism tends to adapt to small deviations in energy intake and consumption in the long term. Most people, if they do not drastically change their lifestyle, usually maintain similar weight levels throughout their lives.