The recovery of polyphenols and other extracts from green tea, fruits and various plants is difficult, due to the low concentration and complicated mixture of such materials. With Amberlite FPX ion exchange resin, these compounds can be selectively adsorbed and recovered with higher purity and increased yield. In one application with pomegranate feed, Amberlite FPX increased the polyphenol purity from 3% to 52%. The resin is FDA-compliant for use with food, and food-grade solvents are used to recover the purified extracts.