Q: i am 27 years old and im 5ft 3 and weigh 52 kg am i underweight

A: You are right on the border of being underweight. Healthy weight for you is considered to be 115 to 140 pounds range or 53 to 64 kgs. That does not necessarily mean you are unhealthy now -- some people naturally have slimmer builds and don't weigh as much -- but you certainly should not be thinking of losing more weight from here.