Dr Rudy Liebel, from Rapid Fast Keto Boost Review Columbia University explains the problem. Think of it like a thermostat and that each person has a set point, when it is reduced below that point the body begins to do things that will force it to recover its lost body weight.
Dr Carel le Roux, an obesity specialist thinks there is another explanation, why some people appear not to get fat despite eating at lot. She says, Studies have shown that this tendency to lay down muscle rather than fat when we over-eat is genetically determined.