LemonsWhy they’re healthy: 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.Citrus flavonoids found in lemons may help inhibit the growth of cancer cells and act as an anti-inflammatory.Quick Tip: 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.Sweet PotatoesWhy they’re healthy: One sweet potato has almost eight times the amount of cancer-fighting and immune-boosting vitamin A you need daily.Quick Tip: 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.AvocadosWhy they’re healthy: Rich in healthy, satisfying fats proven in one study to lower cholesterol by about 22 percent. One has more than half the fiber and 40 percent of the folate you need daily, which may reduce your risk of heart disease.Quick Tip: Adding it to your salad can increase the absorption of key nutrients like beta-carotene by three to five times compared with salads without this super food.GarlicWhy it’s healthy: Garlic is a powerful disease fighter that can inhibit the growth of bacteria, including E. coli. Allicin, a compound found in garlic, works as a potent anti-inflammatory and has been shown to help lower cholesterol and blood-pressure levels.Quick Tip: Crushed fresh garlic releases the most allicin. Just don’t overcook; garlic exposed to high heat for more than 10 minutes loses important nutrients.