Hello sir, I am 21 years old. I have very thin semen just like a water. What is the reason for that and how to make it thicker? My height is 5.5ft and weight is merely 48 kgs. How to increase both height and weight? I need to be tall as 6ft and weight nearly 70 kgs. What should I do to increase my body? Should I join a gym? what kind of supplements I should take? My skin has also become dull and my hair are also turning grey, how to tackle this problem too? My teeth have also become so yellow and have brown stains on some part of my teeth, what should I do? Can i opt for teeth whitening treatment? Please reply as soon as possible.