I have recently decided to attempt to put on some weight/muscle mass, but I'm not sure what type of protein source I should use. I'm 17 yrs old, 6' 1" and 150 pounds. Aside from eating more and beginning a rigorous exercise routine, I'd like to start using a protein supplement. I've looked up info on soy, whey, and casein. Casein seemed like the sourve that would benefit me the most. I'd like some info from someone who has first-hand knowledge in this area, not someone who just looked up the same exact stuff I did. I know how to use google. Thanks!