receptor grade igf lr3 vs media grade

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

media grade is fine no point in spending on receptor grade in my opinion, it is a waste of money

I dont see why receptor grade and media grade would have a different half life. I can understand the purity but it still woudlnt be worth the estra money to get receptor grade unless you have money to burn.