Hi from these few years I'm not gaining weight and looking thin day by day looking very thin and lean day by day previously I was have good physical fitness. but now a days I'm becoming lean consulted dr and gone under general health tests like cbp, crp, thyroid, etc all are normal so whats the issue?? I am having good diet also then why I m becoming lean what's the issue plz give me an advice??? Height : 5 ft 4 inch Weight : 53 kg