Jintropin ® is the only hGH brand in China that are purely 191 amino acid. Because of this patented secretion technology. Most other Chinese hGH brands, although claims there are also 191 amino acid hGH, are either 192 amino acid hGH or still contain small amount of 192 amino acid by testing.
100% Original from the Chinese GeneScience Pharmaceuticals Co., Ltd. (GenSci).