Authentic product. Thanks Nutrabay. Amazing pumps and vascularity. Following GAT sport products from past 2 years. If you wanna workout out hard and want those insane pumps then go for it. It's stim free and can take up to Two scoops. Mix it with BCAA ( take unflavored if mixing bcaa with it. Will make it too sweet. ) You'll boost bench press upto 10lbs. Trust me. Moreover, Nutrabay sent me genuine and original product. Thank you so much.