Hi doctors. I am very underweight. I eat everything like two bananas with mil in the morning. Then 2 bread butter. Then lunch. But I don?t know why I don?t put on weight. I?m very tensed. Please tell me something. I want to get my self diagnosed. In market there are lots of test like in 999 rupees complete body checkup and all. Are these test fine. Can I go with them. Expect an early answer. Thanks.