4 1/2 weeks ago i broke my collar bone. Now its almost healed i can move it arm a lot more. This means i haven't been able to work out for 4 1/2 weeks now which is a downfall. I know i wont be able to work out immediately after the 6-8 weeks is over but soon after I will. I was wondering if there are any pills that people use to gain body mass (not fat) so when i start working out again i will have more to work with?