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Vitamin B12 is an essential water-soluble vitamin in the body, and affects various physiological processes in the body, including energy metabolism, cell metabolism, and plays various important roles in maintaining overall health

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At these levels, minor decimal differences may reflect normal analytical variation, sample preparation, instrument response, integration settings, or testing conditions rather than a meaningful difference in product quality

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The process is based on an absorption gradient high at site of injection and low in the blood