Vitamin B12 is essential for red blood cell production, nerve health, and DNA repair, making it one of the body’s most important nutrients. However, new research suggests the relationship between B12 and cancer may be more complex than previously thought. While low B12 levels can damage DNA and potentially increase cancer risk, scientists are now investigating whether excessively high levels – especially from long-term high-dose supplements – could also be linked to certain cancers or poorer outcomes in cancer patients. Experts stress that balance is key, and supplementation should be based on medical advice rather than the assumption that “more is always better.”
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