Lemons: Just one lemon has more than 100 percent of your daily intake of vitamin C, which may help increase "good" HDL cholesterol levels and strengthen bones.
Add a slice of lemon to your green tea. One study found that citrus increases your body's ability to absorb the antioxidants in the tea by about 80 percent.
Broccoli: One medium stalk of broccoli contains more than 100 percent of your daily vitamin K requirement and almost 200 percent of your recommended daily dose of vitamin C — two essential bone-building nutrients.
Dark Chocolate: Just one-fourth of an ounce daily can reduce blood pressure in otherwise healthy individuals.
Potatoes: One sweet potato has almost eight times the amount of cancer-fighting and immune-boosting vitamin A you need daily.
Let your potato cool before eating. Research shows that doing so can help you burn close to 25 percent more fat after a meal, thanks to a fat-resistant starch.
Salmon: A great source of omega-3 fatty acids, which have been linked to a reduced risk of depression, heart disease, and cancer.