n acetyl l cysteine glutathione precursor biosynthetic scheme. N-acetyl-L-cysteine (NAC) can supply a) Structural formula of NAC
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As a statement made by one of the leaders in vitamin B12 field more than 10 years ago, Carmels idea of cobalamin deficiency should not be diagnosed unless megaloblastic changes are found is still followed by many physicians and health authorities when accepting B12 deficiency diagnosis.1 But as time goes by, evidence and clinical cases []

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Metformin can interfere with the absorption of vitamin B12 in the small intestine, leading to lower B12 levels over time
