Dietary Supplement Uses A vitamin B12 supplement. Directions As a dietary supplement, take 1 tablet daily, preferably with a meal. Warnings KEEP OUT OF THE REACH OF CHILDREN. Active Ingredients Per Tablet: Vitamin B12 (as Cyanocobalamin) 500 mcg; Calcium Phosphate; Microcrystalline Cellulose; Magnesium Stearate; Silica; Croscarmellose Sodium