Sweet potatoes are a great source of beta-carotene, a powerful antioxidant known to give orange vegetables and fruits their vibrant color, which is converted to vitamin A in the body. Consuming foods rich in beta-carotene may reduce the risk of developing certain types of cancer, offer protection against asthma and heart disease and delay aging and body degeneration.
Keep the skin on! The color of sweet potato skin can vary from white to yellow, purple or brown but no matter what color it is, make sure you do not peel it off. A sweet potatoes skin contributes significant amounts of fiber, potassium and quercetin, which acts like an antihistamine and an anti-inflammatory, and may help protect against heart disease.
Source: Medical News Today