We already have a potential treatment for age-related cognitive decline: vampirism (kinda). https://www.scientificamerican.com/article/fountain-of-youth-young-b

We already have a potential treatment for age-related cognitive decline: vampirism (kinda). https://www.scientificamerican.com/article/fountain-of-youth-young-blood-infusions-ldquo-rejuvenate-rdquo-old-mice/ https://www.scientificamerican.com/article/fountain-of-youth...