"At G-SCIENCE™ we are dedicated to cleaner, better living. We pioneered G-PUR® so you can enjoy the foods you love and reduce the absorption of toxins you don't." G-PUR®, Purified Clinoptilolite, is part of the zeolite mineral family. G-SCIENCE™ spent more than a decade to develop the patented process used to produce G-PUR®. It is the only product, of its kind, to be considered FDA Compliant, having submitted our safety data for review and receiving a "No Objection" letter to market in the US.