Plant protein for nutritional products and method of making same

A method for reducing the isoflavone, manganese or nucleotide content of plant protein comprising:

• a) providing at least one anion exchange resin containing strong base sites and weak base sites, said anion exchange resin, prior to step
• b) being subjected to the steps comprising:
• i) conversion to a hydroxide form;
• ii) conversion to a chloride or sulfate form;
• and
• iii) conversion of at least some of said strong base sites to the carbonate form and at least some of said weak base sites to the free base form;
• b) providing a slurry of plant protein;
• c) contacting said slurry with said anion exchange resin;
• and
• d) separating said slurry with reduced content of isoflavones, manganese or nucleotide from said anion exchange resin.