Many antioxidants are plant compounds called polyphenols; the ones in these dark purple berries have been linked to slower decline of cognitive and motor skills with aging. Blackberries also get antioxidant star-power from vitamin C, not to mention just one cup has 7 grams of fiber, about a third of your recommended daily intake.
Just a handful of these nuts a day can help lower cholesterol. Pecans are bursting with the mineral manganese, which boasts age-defying antioxidant powers to help keep skin firm. Bonus for guys: Pecans also contain beta-sitosterol, which contributes to prostate health.