I switched from hydge green 200 iu kits to these Blue tops from purepeptides.I wasnt counting on much.I am lovings these.MUCH better then the hydges.Getting the same results from 3 iu of these as 5-6 hydges.They have Kefei Biotech on the cap.The Vials and seals are nice.Delivery is 3 days US.I hear a lot of people say they think the generic HGH is peptides.When you reconstitute a peptide they dissolve quick and if you go fast they will even bubble up.This doesnt happen with HGH.Been using these for several weeks now and its been a great improvement.Considering getting labs but I dont need to.I think I finally found a go to generic.Sick of wasting money on hydges.This is my second kit with these guys.They gave me a nice deal.