Now Foods P-5-P 50mg 90 CapsNow Foods P 5 P 50mg 90 Caps About Vitamins. co. nz Now Foods P 5 P 50mg Vitamin B 6 (pyridoxine) acts primarily as an enzyme catalyst in many body processes including energy metabolism and neurotransmitter function.* Before it can be used for this purpose it must be converted into its coenzyme form (P 5 P) by the liver. P 5 P eliminates this step by providing B 6 in its converted form, allowing for greater bioavailability. Coenzyme B 6 + Mg