Be sure not to choose a diet to lose weight. Although dieting will make you slim down at first, this sudden slimming will bring a serious problem, that is, loose skin. Dieting to lose weight will lose a lot of subcutaneous fat, and the speed of skin cell renewal in human body is far less than that of fat reduction. Therefore, the skin that was originally propped up by fat will collapse after being thin. Especially for babies over the age of 25, the metabolism is slow, and it is very easy to lose weight and the skin collapses.