Suggest: IGF LR3. Meaning insulin like growth factor (igf) long release.basically it is the better version as it was enhanced to prevent deactivation which happens when it bonds in the bloodstream. The result is a longer half life? 20-30hrs vs 20-30 minutes. Using with GH will work the best they compliment each other, but you can run IGF alone. Here is the relationship: GH results in muscle growth and repair by inducing IGF into liver and body. But IGF directly stimulates Protein and associated cells in the muscle...cells grow, regenerate by splitting, aka hyperplasia. This is amazing because it actually allows you to produce new muscle after puberty when that sts and all you can do is enhance the size of existing muscle. Ok...got sidetracked...However GH is important to add because it signals the release thus speeding up the process.