IGF refers to the chemical itself, and many here refer to all IGF abbreviated as such. IGF-1 is just a longer abbreviation. Just so you know, IGF in its normal form would have to be injected many times throughout the day to get any effect--not very productive. That is why the long r3 form, or lr3 igf-1, was created. This is what everyone sells, including MC.
Read through all the bruthas' results and information about the compound for yourself in this IGF forum.