Higher vitamin B12 from mid‐ to late life is related to slower rates of cognitive decline https://pmc.ncbi.nlm.nih.gov/articles/PMC12568389/ Vitamin B12 must be supplemented from the age of 60 at the latest. Vit B complex, especially vitamin B12, protects against rapid memory loss https://www.chip.de/news/gesundheit-fitness/ab-60-wichtig-dieses-vitamin-schuetzt-vor-schnellem-gedaechtnisabbau_326f1348-e0d6-4111-a161-1b6052410ae5.html