Q: how to gain weight?im 115 lbs. 5 ft 7 in in height

A: See my advice in http://www.mikesfitness.com/content/have-high-metabolism-would-like-to-g... . You need to eat more! You may think you eat a lot now, but you can and should eat more if you want to gain weight. See the Q&A I linked for my peanut butter banana sandwich recipe to quick, cheap, tasty, and healthy calories.