Eggplant

For thousands of years, eggplant has been used in traditional medicine. White eggplant was used to treat diabetes and the roots were used to treat asthma in the ancient Indian system of ayurvedic medicine.

While eggplant isn't the healthiest vegetable, it does provide a good amount of potassium and fiber. It's also a guilt-free food, with only 25 calories and less than 1 gram of fat per serving if you don't soak it in oil. Purple-skinned eggplants are one of the most common types of eggplant. Although not as nutrient-dense as some of the other foods on this list, eggplants are high in antioxidants and manganese, a mineral that is important for bone health and metabolism. The anthocyanin nasunin, which has been proven to have anti-inflammatory and heart-protective properties in animal and test-tube studies, is highly abundant in the peel of purple eggplants.