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Background Vitamin B12 (cobalamin) is essential for normal red blood cell formation, certain enzyme reactions, and neurologic function
You can access Vitamin B12 in animal foods, which contain it naturally or from items that have been fortified with it
Vitamin B12 also may be involved in maintaining sulfhydryl (SH) groups in the reduced form required by many SH-activated enzyme systems
Red Flags in Vendor Selection Avoid suppliers who cannot provide testing documentation, offer prices substantially below market rates, make therapeutic claims about their products, use unclear peptide nomenclature or sequences, ship without proper cold storage for temperature-sensitive compounds, or lack established reputation in research communities
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