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Vitamin B12 is one of eight B vitamins (not twelve, just to make things confusing the substances known as B4, B10, and B11 arent officially considered vitamins)
The key point: the best option depends on the reason for low B12 and your clinical context
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PubChem Reference: View compound profile on NIH PubChem Key Characteristics MOLECULAR PROFILE Formula: C 78 H 123 N 23 O 23 S 2 Weight: 1,815.1 g/mol CAS: 221231-10-3 Origin: Residues 177-191 + N-terminal tyrosine Size: 16 amino acids Structure: Intramolecular disulfide bridge PHYSICAL PROPERTIES Form: White to off-white lyophilized powder Solubility: Readily soluble in water
Contraindications include: Sulfa allergy, due to potential sensitivity to methionine derivatives
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