What Is It? P5P50 is pyridoxal 5` phosphate (P5P), the active metabolite and predominant form of plasma pyridoxine (vitamin B 6 ). Uses For P5 P50 Menstrual Comfort: Clinical trials have indicated that vitamin B6 may support menstrual comfort, in part by maintaining healthy neurotransmitter unction to promote healthy mood and mental functioning. Nervous System Support: Various Physiological Support Properties: What Is The Source? Pure Encapsulations P 5 P50 is synthetically derived.C (ascorbyl palmitate) is derived from corn dextrosefermentation and palm oil.derived from pine cellulose. Are There Any Potential Side Effects Or Precautions? If pregnant or lactating, consult your physician before taking this product.6 supplementation should notify their health professional, as vitamin Recommendations: Pure Encapsulations recommends 2 capsules per day, in divided doses, with meals.Suppliment Facts