Dementia is still not yet understood well enough to identify a single causal factor, even with correlated variables. Personally my money is on HSV (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8234998/). We don't have a genetic predisposition / family history of early onset dementia.
In her case, retirement and being unmarried/socially isolated during COVID lockdowns obviously contributed to a more rapid progression in decline. But you would never say that social isolation causes Alzheimer's. There are many other people with active social lives and happy marriages who get early dementia. The same is almost certainly true with diet.
In her case, retirement and being unmarried/socially isolated during COVID lockdowns obviously contributed to a more rapid progression in decline. But you would never say that social isolation causes Alzheimer's. There are many other people with active social lives and happy marriages who get early dementia. The same is almost certainly true with diet.