eli5: why is gaining weight so easy but losing weight so hard

Question

eli5: why is gaining weight so easy but losing weight so hard

In: 61

Answer 1

It’s a biological advantage to keep fat and store as much food as possible as fat. Our human bodies evolved in an environment where food was not guaranteed. Going days without food. Storing excess calories as fat lets us burn that later for calories when needed. But our bodies use fat very efficiently because at that point the body thinks you are lacking food and therefore needs to use the fat you have for a long time.