IGF1-LR3

Insulin shares a common ancestry with IGF-1 and with 45% amino acid homology, as well as very close relationships in the structure of its receptors and post-receptor cascade, also acts as a growth hormone. It has protein anabolic activity and stimulates IGF-1 synthesis. 
IGF-1 coordinates balanced growth among multiple tissues and organs. In contrast, autocrine/paracrine IGF-1 can stimulate local, unbalanced growth independently of systemic GH. 

IGF-1 Benefits:
Musculoskeletal development & growth
Increases bone density & inhibits apoptosis
Anabolic with insulin like properties 
Increases insulin sensitivity & improves glucose uptake.