I'm seriously underweight right now at the age of 21. I'm unable to increase my diet, and still wish to get 1-2 inches increase in height and gain more weight.
Any tips?
You should go to gym and have a proper diet and motivational is important too.
You have to learned how to control proper diet, going to the gym will helps you out especially if there's a good trainer who can assist you to what
possible diet to take in order to gain good muscle builders vitamins, from then you'll be able to get something, a good results that will start your
journey in gaining some weights.