When introducing 3500, 4000 or 5000 calories every day, or cutting calories down to 1500, 1200 or 1000 calories per day, you disrupt the normal mechanism that should work within an allowed limit.
How the weight keeping mechanism works:
There are many "set points" of different measures of the body that either genetically coded (like body temperature), or dictated by the surrounding environment (like stress). These set points are present in a part of our brain called Hypothalamus. One of the major functions of the hypothalamus is to regulate secretion of endocrine hormones directly into the blood. Hormones and nerves form the 2 regulatory mechanisms of the body.
The hypothalamus also sets a point for body weight based on the level of the input and output of calories it is used to. It seeks to keep the body weight constant, even if this point is …