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J Invest Dermatol 1993, 100: 28S-34S
Most vegans who use fortified foods or a daily supplement maintain normal B12 levels without ever needing an injection
Supplementary Validation Method: LCMS/MS For high-sensitivity detection requirements, liquid chromatographytandem mass spectrometry is used for supplementary validation, especially suitable for trace component analysis and metabolic studies
Hanlon P, Butterly E, Wei L, Wightman H, Almazam SA, Alsallumi K, et al
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