Hey @geke, quite the contrary. This is a rather complex question!

1- Longitudinal studies have shown that low blood pressure may predispose individuals to develop Alzheimer's and other types of dementias. This might indicate a consequence of blood supply to the brain.

But, do keep in mind, this is something that can indeed be counterbalanced by preventive measures :)

Ps: Interestingly, low blood pressure can become a consequence of dementia too, as - because of the loss of sympathetic drive - the dementia process may lower blood pressure,

It is great to hear from you! :*
Take care :)