IGF lr3 if you are trying to build muscle and lose fat.
HGH converts to different types of growth factors that are beneficial in areas outside of bodybuilding , skeletal muscle etc... such as skin elasticity, finger nail and hair health.
Human Growth Hormones overall benefits are mainly attributed to the Insulin-like growth factor 1 it converts to. You can find this fact anywhere from bro science to scholarly articles on medical science , published medicine "pub med studies".
Make me choose between "Lr3 IGF 1" and "Growth Hormone" - my answer is likely the same as most bodybuilders in choosing "Lr3 IGF 1"
Now if I was financially able to do both "HGH" and "Lr3 IGF-1" then I would do both. Who would not want healthier looking skin, nails and hair right! I certainly would, but as a bodybuilder who is mainly interested in hyperplasia, and reduction in bodyfat , longR3 IGF-1 is the only way to go if you make me choose between the two!
Nearly every IGF 1 study to date on more species than I can name here including ours, shows the overexpression of IGF-1 signals stimulation and sometimes significant stimulation of muscle growth. Be that type 1 slow twitch oxidative muscle fibers or type 2 fast twitch glycolytic muscle fiber.
For those who have been out of school far to long type 1 is low intensity long lasting muscle contraction. Type 2 is obviously quick high intensity muscle contracting
I have written for and shared with muscle chemistry quite a few of my insulin-like growth factor articles that can be searched and found here. I do consider myself to be somewhat of an IGF 1 aficionado and apologize for sometimes going a little farther than needed with my answers and explanations.