More recent meta-analyses of prospective cohort studies in older adults have not found a relationship between blood cobalamin concentration or dietary vitamin B 12 intake and cognitive decline or dementia (80, 81)
Wallis A, Ball M, Butt H, et al
Along with exercise, eating nutritious food, and taking supplements, the addition of vitamin B12 injections to my routine offers additional benefits too numerous to ignore
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Stem Cell Reports via PubMed (PMID 25937370), 2015 A search of the ClinicalTrials.gov registry for dihexa returns zero registered clinical trials the compound has never formally entered human testing
doi: 10.1093/nar/gkae300 85 MashiachESchneidman-DuhovnyDPeriAShavitYNussinovRWolfsonHJ