Terry Naturally P-5-P/Mag, Pyridoxal-5-Phosphate (B6) & Magnesium, 120 Capsules, EuroPharmaEuroPharma Terry Naturally P 5 P Mag Dietary Supplement. Bio Active Vitamin B6 and Magnesium. Vegan. Pyridoxal 5 phosphate (P 5 P) is the active form of Vitamin B6. Unlike other forms it does not require conversion by the liver. Chelated magnesium promotes P 5 P metabolism. Significant benefits for heart health. Aids tendon, ligament and cartilage function. Supports healthy muscles and protein metabolism. Supports serotonin and dopamine formation.