... 75%, 80% Phloridzin 40%, 60%, 80%, 90%, 98% Phloretin 70%, 80%, 90%, 98% As the 19centurty Welsh proverb ... . Major apple polyphenols include: epicatechin, caffeic acid, phloridzin, phloretin, avicularin, reynoutrin, hyperin, isoquercitrin and quercitrin. Among these ... bioactive compounds, phloridzin and phloretin, respectively, havs also been proven to be of ...