Hmm but as I understand it, dementia begins in your 30s. It's just that we don't see the signs of it until much later. So if it is protective, waiting doesn't s

Hmm but as I understand it, dementia begins in your 30s. It's just that we don't see the signs of it until much later. So if it is protective, waiting doesn't seem wise (on the dementia side of it).