Klaire Labs Protectagen supports GI tissue while promoting DNA repair, and supports the body's natural defenses at the molecular level to protect DNA and guard against oxidative stress. AC-11, the active ingredient in Protectagen, is a patented, water-soluble botanical extract of Cat's Claw (Uncaria tomentosa). Is standardized to contain 8% to 10% carboxyl alkyl esters, compounds responsible for 90% of its bioactivity. Unlike other preparations of Uncaria tomentosa, AC-11 is free of harmful toxic oxindole alkaloids (TOA's). Recommended Use: 1 capsule, 1 to 2 times daily with food or as directed by a healthcare professional.