Ultra Tested Tested For More Than 950 Contaminants! Heavy Metals- Bacteria- Yeast- Mold- Pesticides & More Casein & Gluten Free Hypoallergenic Dietary Supplement Kirkman offers pure, vitamin B-6 in 50 mg hypoallergenic capsules formulated for individuals with special requirements and sensitivities. Our vitamin B-6 source is pyridoxine hydrochloride. Capsules are made from plant cellulose. This form of vitamin B-6 is preferred by some parents and physicians to create unique vitamin B-6/magnesium ratios for certain individuals or to achieve ratios not attainable with Super Nu-Thera.