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The other authors declare no competing interests
However, its common for blood tests to reveal inaccurate information regarding B12 levels since a high percentage is stored in the liver and not always revealed through testing (for example, taking large amounts of folic acid has been found to mask vitamin B12 deficiency in some patients)
Nevada: Henderson, Las Vegas
A vitamin B12 injection is an injection containing large amounts of cyanocobalamin which is a man-made form of vitamin B12
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