Want a food that's as scrumptious as a high-fat, high-calorie snack? Tickle your taste buds with a sugary spud. Although they're a favorite around Thanksgiving, sweet potatoes are beneficial to your health all year long. Sweet potatoes are a great source of vitamin E, vitamin C and vitamin A. The latter is particularly beneficial for smokers, who may create a vitamin A deficiency and develop emphysema as a result. These spuds are also rich in antioxidants. Research shows that this popular side dish improves heart health, fights high blood pressure and protect against inflammatory conditions like arthritis. The high fiber content of sweet potatoes keeps the digestive system running smoothly and may protect against colon cancer. The low glycemic index of sweet potatoes means these spuds will cause a gradual rise in blood sugar, leaving you satisfied longer.