If it runs in your family you should be taking large dozes of Vitamin D as well as zinc daily as preventative treatment
Since you mentioned vitamin D3, there may be a correlation between sunlight, D3, latitude and alzheimers.
Being debated:
Noting that I am not medically trained, it seems get rid of the blue light to sleep. Then get the blue light to wake up.
the top one is very interesting....
i knew about sleep cleansing the brain, but had no idea about sunlight first thing in the AM...
Yes...my doc told me to get outside and look at the sun (not directly) every a.m.