First of all, I'm new here to the boards. I hope I can be of some use to these forums as well as learn a thing or two. Secondly, I've got a problem. I was born 3 months premature, weighing in at a whopping one pound-fourteen ounces. Throughout the years, I have sported a thin build, and now it's starting to frustrate me. I'm 21, and now weigh a whole 120 pounds. While you may say "just eat more, lift weights, and eat some more!", I simply can't gain weight. How is it possible to gain some more weight/muscle, if my unfortunate combination of a fast metabolism and a low fat cell count, limits my progress? What can I do? Thanks in advance for any help you may give!-M.Y.