Can Diet Affect Your Alzheimer's Risk?

I was reading the Boston Globe this morning and came across MORE good news for those who supplement with fish oil and Vitamin D.* According to the article:

In the study published online in the journal Neurology, researchers measured the level of nutrients in the blood of nearly 300 seniors and found that those who had high levels of vitamin D and omega 3 fatty acids -- both found in salmon, tuna, and other fatty fish -- as well as vitamins C, E, and B -- antioxidants found in fruits, nuts, and green leafy vegetables -- appeared to have somewhat more protection against early symptoms of Alzheimer’s. They were less likely to have cognitive difficulties, memory problems, and brain shrinkage -- an indicator of Alzheimer’s -- than those who had low levels of these nutrients.

*The researchers, though, didn’t distinguish between nutrient levels raised due to foods rather than supplements, so it’s tough to say whether seniors can simply pop supplements to reduce their risk of Alzheimer’s or whether they need to rely on a nutrient-rich diet.