glutathione with lcysteine Intercellular antioxidant support and glycine Cysteine Regulates Oxidative Stress and
Description
Additionally, the fermentation process also creates trace amounts of alcohol (usually under 0.5%), which may interact with your medication

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[19] The enzymes that use B 12 as a built-in cofactor are methylmalonyl-CoA mutase (PDB 4REQ [43] ) and methionine synthase (PDB 1Q8J)
Campbell A, Heydarian R, Ochoa C, Dwivedi AK, Nahleh ZA
