Natural Factors, B12 Methylcobalamin, 1000 mcg, 90 Chewable Tablets - iHerb.com
Dietary Supplement Biologically Active Form of B12 Support for Nerve Function, Energy Production & Red Blood Cells Purity & Potency Guaranteed Natural Factors Methylcobalamin is active immediately upon absorption, while other forms (e.g., cyanocobalamin ....