Taking a multivitamin reduces hair loss in people who have no nutrient deficiency.

Is it true that taking a multivitamin reduces hair loss in people who have no nutrient deficiency?

No. A peer-reviewed review of diet and hair loss states that research on whether nutrient supplementation helps in the absence of documented deficiency is lacking, and that some supplements may worsen hair loss or cause toxicity; a second review finds routine multivitamins give little clinical gain in generally nourished adults. One clinic page suggests supplements may help hair growth, but frames benefit around deficiency.

Verdict: REFUTED · 1 source for, 3 against · Last checked 3 Oct 2026

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

7 Vitamins and Supplements for Hair Growth. (n.d.). health.clevelandclinic.org. https://health.clevelandclinic.org/the-best-vitamins-supplements-and-products-for-healthier-hair

Guo, E. L. & Katta, R. (2017). Diet and hair loss: effects of nutrient deficiency and supplement use. doi.org. https://doi.org/10.5826/dpc.0701a01

Diet and hair loss: effects of nutrient deficiency and supplement use - PMC Lock. (n.d.). pmc.ncbi.nlm.nih.gov. https://doi.org/10.5826/dpc.0701a01

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

Can reducing DHT by dietary means reduce or reverse hair loss?. (2015). skeptics.stackexchange.com. https://skeptics.stackexchange.com/questions/28865/can-reducing-dht-by-dietary-means-reduce-or-reverse-hair-loss