The following tests were performed by GeneScience (GenSci) Pharmaceutical, Inc. - the first domestic rHGH manufacturer in China. We compared 3 different rhGH brands and concluded that Jintropin® has the highest purity. Purity means bioactivity and safety.
http://www.hghplace.com/Chinese_HGH_comparison-28.html
http://www.hghplace.com/Chinese_HGH_comparison-28.html

Comment