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 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.
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