Originally Posted by Couch
Not sure how old the poster is you were replying to, but as long as he's over 18 he should be fine. I wouldn't mess with anything other than eating a clean diet at that age (or now), but everyone has their own opinion.
He'll I'm 26 and my metabolism is just as crazy as when I was 18. I was eating 2 gallons of ice cream a week at 17, with coke on top and didn't gain a pound doing that for nearly a year.
seriously a good multi vitamin and whey protein is all you really need. I've found that 80% is diet and 20% is working out. My metabolism is crazy also thats why I have to eat like a beast if i want to gain weight =/.