Lindens Vitamin B12 250mcg Tablets are potent, providing 10,000% NRV (Nutrient Reference Value) of Vitamin B12 per tablet. About Lindens. Potent 10000% NRV dose of B12. Vitamin B12 25mcg 1. Vitamin B12, Bulking Agents (Microcrystalline Cellulose, Dicalcium Phosphate), Anti-caking Agent (Magnesium Stearate).