Why Is It So Hard To Lose Fat?

The most basic goal of every living creature is survival and the most basic requirement for survival is energy - in the form of calories taken in from food. In order to survive in the harsh conditions that have existed for most of human history, the human body had to find a way to make the most of food when food was abundant, so that it could keep going when food was scarce. It achieved this goal in two ways: energy storage and energy conservation. When there are a lot of calories in the diet, the body uses what it needs and stores the rest in fat cells. When calories are cut back, the body conserves energy by slowing down its energy burning processes, or metabolism.