P5P50 (activated B-6) 60 vcapsPyridoxal 5' phosphate (P5 P) is an active metabolite and predominant circulating form of pyridoxine (vitamin B6 ). P5P is a cofactor for more than 100 enzymes. 1 It is involved in the synthesis of neurotransmitters and works with folate and vitamin B12 in the metabolism of homocysteine and the formation of red blood cells. 1 It is also required for enzymes that metabolize carbohydrates, fats,and proteins. 1 3 P5 P facilitates the release of glycogen