Bulk Vitamin B12 Tablets 1000mcg are a specific, high-strength form of vitamin B12, which promotes normal function of the immune system and contributes to the reduction of tiredness and fatigue. Provide 40,000% of your reference intake in a single, potently dosed supplement. Vitamin B12 contributes to maintaining normal function of the immune system, normal red blood cell formation, and normal energy-yielding metabolism both during and after intense physical exercise. Available in 60 tablet and 180 tablet packs. Suitable for Vegans and Vegetarians.