The most current formula for this product is Long-R3 IGF-1. This formula has been chemically improved and has had amino acid aberrations that elicit this formula to avoid the establishment of proteins in the human organism. Also let this formula have an ample prolonged half-life of approx. 20-30 hours.
Igf-1 long r3 is an 83 amino acid analog of human IGF-I which actually comprises the complete human IGF-1 sequence, but with the substitution of an Arg for Glu at position 3, as well as a 13 amino acid extension peptide at N- terminal. This makes the far R3IGF-I significantly more potent (2-3x) than IGF-I in studies because it has a lower affinity to be rendered inactive by IGF binding proteins and consequently more potential activity in the body.