1: Nuts
Nuts contain monounsaturated and polyunsaturated fats to keep your arteries clear, as well as levels of precursors of serotonin to boost mood. One ounce a day is just right; more is fine, but remember to be careful of calorie overload – an ounce is about twelve walnuts or twenty-four almonds.
RealAge Difference: Men: 3.3 years younger, Women: 4.4 years younger