Hutropin HGH is a form of human growth hormone – it is produced by recombinant DNA technology using bacterial (E. coli) expression system. The amino acid sequence and tertiary structure of the Hutropin – somatropin (HGH) is identical to that of naturally occurring HGH. Hutropin comes in a form of lyophilised powder, in 1 x 10IU HGH per vial.