A few days ago I was reading about a supplement called fisetin. It is found in strawberries. One of the benefits references protection from Alzheimer’s. It’s suppose to help the body rid itself of dying cells, which would fit into this theory.
https://community.bulksupplements.com/fisetin-benefits-side-effects/
Note: it’s found in apples, onions, persimmons, cucumbers and strawberries. If you just balance your diet out out...you get enough without the supplement situation.