What is the concentration of Alpha GPC? Customer Service Manager November 22, 2023 16:51 Updated Alpha GPC content is 50%. Due to hydroscopic nature of product dicalcium phosphate is used at a rate of 50%. Almost all GPC has this rate of alpha gpc Related articles What is the MCT Oil Powder composition breakdown? Does Canadian Protein test the product for quality? Is Canadian Protein products halal? Where are your products manufactured? Did Canadian Protein remove colouring?