using slightly different methods , we have confirmed these results with purified hgh and have extended them to show that four daily injections directly into the tibial epiphyseal plate of 1 or 5 micrograms/day purified rat gh or recombinant dna-derived hgh , but not of hprl ( 6 micrograms/day ) caused significant cartilage growth compared to that of the vehicle-injected contralateral tibia in rats that had been hx 14 days before the first injection .
C3714500
hgh
C0018270
growth