Apple polyphenols 50%, 70%, 75%, 80% Phloridzin 40%, 60%, 80%, 90%, 98% ... per day in humans.Of all the phytochemicals in apples, polyphenols play an important role, their main function is protection against ... be more available for eventual absorption into the bloodstream. Major apple polyphenols include: epicatechin, caffeic acid, phloridzin, phloretin, avicularin, reynoutrin, hyperin, isoquercitrin ...