Alzheimer's gene 'linked to Vitamin D'

It seems to me that if some people have a predisposition to develop Alzheimer's when insufficiency Vitamin D is available, the answer is to change the sun avoidance policies that have led to ever lower 25(OH)D status year on year. It may also help to make more readily available effective strength supplements and to raise the RDA to at level that allows breast milk to flow replete with vitamin D as our bodies naturally evolved to produce.

Our bodies have the DNA we evolved with and given ample sun exposure naturally attain and maintain 25(OH)D status between 135~225nmol/l 54ng ~ 90ng. To attain the lowest of those levels associated with least chronic illness, requires intakes of D3 around 5000~6000iu/daily.