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Some studies suggest that individuals with low levels of B12 are more prone to developing age-related cognitive decline and that supplementation can slow down or even reverse certain symptoms of mental impairment

Am J Psychiatry 154:4268 Guaraldi GP, Fava M, Mazzi F, la Greca P (1993) An open trial of methyltetrahydrofolate in elderly depressed patients

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The study tested a copper-tripeptide complex on human hair follicles cultured outside the body (ex vivo) and on cultured human dermal papilla cells (in vitro)

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