Hygene the company that makes hygetropin had a lead scientist there named Dr Lin- he owned the rights and "name" of hygetropin (and the original site .cn) well, Hygene and Dr Lin had a disagreement years ago, they booted him (or he left) and he started his own UGL version of hyges which are these yellow tops and his version of green tops, this guy knows what he's doing so yes they are still good, BUT Hygene the company, they owned the licenses and patents required to legally produce HGH in China, so since Lin owned the original site he kept that and Hygene changed theirs to hygetropin.com.cn, they are the original hyges just without Dr Lin and they still are one of the 5 companies that are legally licensed to produce HGH in China, they make the brown/green tops that have .com.cn on the box. Like I said , Lin is a top original scientist that helped make Hygene only now he's making his stuff UGL, I mean it could be still a high quality lab he's doing it in but he just doesn't own the patents and licenses to do it. Both are good, if anything the Hygene original ones are slightly better but bro your gonna have great gains either way real hyges whether they are Lin or Hygene hyges are strong as hell