Tag: Is b12 toxicity possible

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Is B12 toxicity possible? Understanding the risks of high vitamin B12

Oct 27, 2025 •

4 min read

According to the National Institutes of Health, no official tolerable upper intake level has been established for vitamin B12 due to its low toxicity potential. Yet, the question remains: is B12 toxicity possible? The answer is nuanced and depends heavily on the source and dosage of the vitamin.