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the claim
For most healthy adults, multivitamins and many common dietary supplements provide little to no proven health benefit.
the verdict
CONTESTED PARTIAL
Recorded sources
4 sources for · 4 against
Is it true that for most healthy adults, multivitamins and many common dietary supplements provide little to no proven health benefit?
Partly. Several reviews report that multivitamins give little clinical gain in generally nourished adults and little evidence supports supplements for cognition, while other reviews report benefits for specific high-dose B-complex formulas and in targeted clinical contexts. The evidence covers parts of the claim rather than settling it for all healthy adults.
Verdict: CONTESTED PARTIAL · 4 sources for, 4 against · Last checked
Evidence for · 4
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Do vitamin supplements have any health benefits?. (2014). skeptics.stackexchange.com. https://skeptics.stackexchange.com/questions/20227/do-vitamin-supplements-have-any-health-benefits
Evidence against · 4
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Sarris, J., Mehta, B., Óvári, V., & Giménez, I. F. (2021). Potential mental and physical benefits of supplementation with a high-dose, B-complex multivitamin/mineral supplement: What is the evidence?. doi.org. https://doi.org/10.20960/nh.03631
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More for · 3
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M, D., S, T., M, K., M, F., N, A., & MH, J. (2026). Multivitamins and cognitive health in older adults: bridging evidence, gaps, and controversies - a comprehensive narrative review.. doi.org. https://doi.org/10.1097/ms9.0000000000004720
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PM, N., S, A., & V, D. (2026). Multivitamins in Adult Medical Practice: Evidence, Risks, and Pragmatic Prescribing.. doi.org. https://doi.org/10.7759/cureus.101985
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A, F., A, W., & BJ, K. (2024). Review of Supplements That Patients Commonly Report Using for Dementia.. doi.org. https://doi.org/10.3390/jcm13247541
More against · 3
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Do dietary vitamin supplements like Berocca help improve mental performance?. (2015). skeptics.stackexchange.com. https://skeptics.stackexchange.com/questions/28173/do-dietary-vitamin-supplements-like-berocca-help-improve-mental-performance
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BVB, J., M, M., R, K., & R, J. (2025). Dietary supplement considerations during glucagon-like Peptide-1 receptor agonist treatment: A narrative review.. doi.org. https://doi.org/10.1016/j.obpill.2025.100209
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Frisbie, S. H., Mitchell, E. J., Hoeltge, A., Pett, L. A., & Hoeltge, M. G. (2026). Excessive manganese content in children’s multivitamin supplements: Potential for neurodevelopmental harm and other adverse health outcomes. doi.org. https://doi.org/10.1371/journal.pone.0343600
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