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Vitamin B12 is not made by the body and is provided either by diet or supplementation
Table of Contents: What are the main types of vitamin B12
Choline, for example, is involved in lipid transport and metabolism (a vital part of energy storage), cell membrane signaling, and nervous system function
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Depending on the individual, they start working within 48 to 72 hours of the first dose, but they might take three months to completely correct a B12 deficiency
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