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Vouga, M., Baud, D
Red Blood Cell Formation: Inadequate B12 levels can lead to anemia, resulting in reduced oxygen delivery to your body's tissues, causing weakness and paleness
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Image: Peter Dazeley/Getty Images About the Author Marygrace Taylor, Health Writer About the Reviewer Pieter Cohen, MD, Contributor Disclaimer: As a service to our readers, Harvard Health Publishing provides access to our library of archived content
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