bigtasty21
New member
i heard over on bolex a little about receptor vs media grade igf..and supposedly receptor grade is almost totally pure, while media grade is 75-85% pure (about) which is why its cheaper in price. also heard the half life of receptor grade is 18 hrs...vs 12 hrs with media grade, making once daily injections with recpeptor grade possible. I believe someone over at bolex emailed gensci and asked them this and that was their answer. Anyone know more about this receptor grade? thnx