Weight: 130lbs
Height: 5"8
--Looking to gain muscle more than anything.

I dont know how many units to do? everyone is talking about iu's but i dont exactly know what this is

I bought my vials already filled and my insulin needles have markings from 1-50

ive been fillin this up to the 20 unit mark and doing that everyday for the past 5 days since ive started....

anything i am doing wrong?