Dual-Tox DPO® is designed to support balanced activity of the body’s Phase I and Phase II detoxification processes.* It has been formulated to contain select ingredients, Dual Phase Optimizers (DPO), to enhance the activities of hepatic detoxification enzymes and support healthy detoxification pathways.* The 5-MTHF in this formula – Quatrefolic® – is the most biologically active form of folate, allowing rapid uptake into the bloodstream.* The 5-MTHF in this formula is also known as the "L" form of 5-MTHF since it is the reduced form of folate.