Douglas Labs Klean Endurance.
About the Manufacturer
At Douglas Laboratories, there is no greater mission than assuring that each and every supplement produced is of the highest quality. When you see the Douglas Laboratories Quality Emblem, be assured that only the finest raw materials are being used, and that all manufacturing is performed under the strictest of guidelines. Because these products are developed specifically for exclusive distribution by healthcare professionals, our emblem has become a recognized symbol of quality that patients around the world have come to rely upon and trust.