Sweet potatoes are an excellent source of starch and therefore, energy. They provide some protein, Vitamin C, Vitamin E and a huge amount of carotenoids, including Beta-carotene. It is these and other phytochemicals in the tubers that make them such a powerful anti-cancer food. A mere 100g a day has been found to dramatically reduce the risk of lung cancer.

The glycemic index indicates the impact a food substance has on blood sugar levels. A high glycemic index means blood sugar levels can spike. diabetes and others who monitor their blood sugar levels seek to avoid foods with a high glycemic index or load. Sweet potatoes have a glycemic load of only 17, in comparison to a white potato, which has an index of 29.

Their high vitamin B6 content also helps to keep blood sugar levels steady, helping to prevent mood swings and relieve depression.

Recent research indicates that steaming or boiling sweet potatoes rather than roasting them helps to preserve their low glycemic index.

Their high levels of Vitamin E means sweet potatoes are a skin superfood. Orange-skinned sweet potatoes are rich in the anti-aging, antioixidant Beta-carotene, which is stored in the fat layer of our skin and protects against the damage from the sun's ultraviolet rays.

Sweet potatoes are extremely versatile and make a wonderful health food for both children and adults alike. They can be boiled and mashed, roasted, or even juiced.