So i'm an extremely skinny 15 year old and i basically want to get a nice, musclular body, especially my chest. So my plan is to first try and gain some weight before i hit the gym so i have more fat to turn into muscle but even eating heaps more than i usually do is hard. I have heard that Mass Protein is good for gaining weight BUT only works if you're exercising at the same time (turns into fat muscle). I just wanted to double check with all the professionals on here before i believe anything haha, if that wasn't the case then taking mass protein as a side with my dinner would help heaps with gaining those extra few kgs. Thanks guys, any extra advice with gaining weight would be helpful too