Old and thin

The health hazards of obesity are well known. Therefore, there is a saying that "the rich can hardly buy the old to lose weight". But nothing is absolute. As far as weight loss is concerned, it can be divided into two situations: one is physical weight loss, which has been the case for many years, and there is no physiological abnormality, which is related to genetics; the other is pathological weight loss , Caused by some obvious or hidden disease.