Stalling my own dementia

As I watch my sister sink deeper into dementia, I feel frustrated at not being able to do anything for her.  I notice my own memory getting worse and worse.  I guess all we can do is take care of ourselves.  I exercised this morning.  Not to look good, but to get oxygen to the brain.  And I lifted weights the other night, I should do it again tonight before bed.  I often do puzzles and games.  What I really need to work on is eating healthier.  I've said it before, but things like replacing the ice cream with watermelon.  And carrot sticks instead of potato chips.