Hi, I thought you may like this Mentalrobics exercise from Braingle.com:
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Antioxidants

Free radicals are molecules that are naturally produced by the body during normal functioning. Free radicals are highly reactive and thus are likely to take part in a chemical reaction. In the body these reactions tend to be destructive, and over time can contribute to various problems, including memory decline. Antioxidants are chemicals that can neutralize these free radicals and thus prevent them from initiating any harmful reactions.

Antioxidants

Vitamin A (Beta-carotene): Found in carrots, squash, broccoli and other fruits and vegetables.
Vitamin C: Found in citrus and green leafy vegetables.
Vitamin E: Found in nuts, seeds, whole grains and green leafy vegetables.
Bio-flavonoids: Found in berries and green tea.

In one study, vitamin E was shown to help prevent normal age related memory decline [ For more on 'age related memory decline' go here: http://www.braingle.com/mind/111.html ]. In another study vitamins C and E showed some promise in helping patients with dementia [ For more on 'dementia' go here: http://www.braingle.com/mind/529.html ]. Many other studies have shown additional health benefits from eating antioxidants. So, eat your vegetables!
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For more mind exercises: http://www.braingle.com/mind/