Welcome to Rexius Nutrition! Mankato’s ONLY locally owned nutritional supplement store. At Rexius Nutition, we only carry the BEST, and we forget the REST! Offering the latest and greatest in cutting edge nutritional supplements, at internet prices, in a convienent local storefront! Located within Kato CrossFit at 1522 N. Riverfront Dr., here in Mankato, MN.