how does a blood transfusion for someone with Alzheimer’s help that person?
Some research indicates that Alzheimer’s can be caused by plaques in the brain; possibly young blood can dissolve such plaques . . . this is just a thought. I do not have knowledge here.
What I do remember reading years ago, was a book by Dr. Abram Hoffer, who apparently reversed his own mother’s Alzheimer’s with Niacin, vitamin B3. Niacin is a vasodialator - it enlarges constricted capillaries, so more blood can get through. It has been researched and used since the 1950s for heart assistance. An interesting side effect is enhanced orgasm, due to increased histamine production.