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Injecting the B12 bypasses the digestive system for faster absorption into the bloodstream, and more noticeable results
They are short chains of amino acid monomers linked by covalent bonds
While it may provide some additional energy, particularly in those who were B12 deficient in the first place, high-dose B12 is not always recommended
At the beginning of pregnancy, low vitamin B12 levels can increase the risk of neural tube defects