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It directly participates in the liver's detoxification process, helping to metabolize drugs and pollutants, and also regulates melanin production, thus being used in skin-whitening products
(For example, taking large amounts of folic acid has been found to mask vitamin B12 deficiency in some patients.) What Are B12 Shots
So a high number caused by tablets, fortified foods or injections is not itself a toxicity problem
Missing evidence is not evidence of safety
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