Food for Life
Dementia: Eating Plenty of Apples, Berries and Tea Linked to Lower Risk

"Though this study doesn’t explain why flavonoids have this beneficial effect on Alzheimer’s disease, it’s clear that high, long-term dietary intake of a wide range of flavonoids is associated with lower risks of dementia in adults. However, it doesn’t claim flavonoids cure dementia, nor will consuming flavonoids on their own [...]