Can someone explain to me how IGF-1 is more cost effective than HGH? I've been trying to figure this out. 1mg of IGF-1 won't even last a month, but it costs the same as 500 I.U. of HGH which can last up to 3 months. I'm trying to figure out which one to start out with to put on some lean muscle mass and lose about 3% more bodyfat. Any help would be appreciated.