I'm 5'10", 24 years old, and have been skinny my whole life. About a year ago I weighed ~125lbs, started working out around March, slacked off over the summer, started working out again regularly in September and now have a routine where I hit the gym 3-4 times a week. I started eating more/more frequently, and peaked at 150lbs about a month ago. I got sick and am now down to 145lbs, but I am looking better than I did last year. I now have defined muscle and I like where I am heading, but I am interested in taking supplements to help me gain weight/muscle. Not really sure what I should be looking into, whether I should take whey protein or something else? I am not looking to win strongman competitions or fight UFC, I know I will have a rather slim build for the rest of my life. I just want to get to ~180lbs and have a defined body. Any suggestions, or any more questions that I should have answered?