Herbal Clean QCarbo20 is designed to provide the EXTREME STRENGTH necessary for people with higher toxin levels or larger body mass. The proprietary blend of potent cleaning herbs in the Super Boost Concentrated Detox Tablets provides a deep cleanse of your body's major elimination system. We recommend that you advise your customers that this product is not sold with the guarantee that it will pass a drug test. However, by using this product and following the hints and tips on the linked PDF, they are taking the best course of action to expel toxins from their body. See details below regarding product guarantee.