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Research-context answer No human study has compared the two
Current medical evidence shows that individuals with normal B12 levels are unlikely to experience increased energy or reduced fatigue from extra B12 supplementation, as the body simply excretes what it does not need
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Vitamin B12 is essential for red blood cell formation, neurological function, and DNA synthesis
For vitamin B12 pills, most people take these daily in doses recommended by their doc but taking 1,000 mcg daily is pretty standard
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