No imageB Vitamins · SwansonP-5-P (Pyridoxal 5 Phosphate)ModerateUnderdosedWhat the lab foundContained only 65.4% of its vitamin B6 (13.1 mg instead of 20 mg).Failure type · UnderdosedActive ingredient measured significantly below the labeled amount — not therapeutic.SourceIndependent lab testing, 2024