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NOW B-12 isa powerful blend of vitamin B-12 andindispensablenutrients for cellular energy utilization.*With a complete B Vitamin profileand an energizing 10,000 mcg blast of Vitamin B-12, this advanced energy formula will keep you at the top of your game!* We've carefully formulated the nutrient profile in NOW B-12 10,000 mcg Energy Boost to work synergistically, in order to keep you sharp, focused, and naturally fired-up for hours!*

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Vitamin B12 deficiency occurs when the body lacks enough vitamin B12, an essential nutrient that supports red blood cell formation, nerve function, and DNA production

While Cyanocobalamin is widely used, your body has to convert it into an active form it can use