Type 2 diabetics can eat sweet potatoes, which are considered a diabetes superfood due to their high content of vitamins A, C and fiber, explains Everyday Health. Sweet potatoes are low in fat, calories and have a low glycemic index rating, notes the North Carolina Sweet Potato Commission.
Foods low on the glycemic index, such as sweet potatoes, take longer to break down in the body, so insulin and blood glucose levels fluctuate less, notes the North Carolina Sweet Potato Commission. Eating sweet potatoes with the skins on, raw or cooked, keeps them in the low glycemic zone. Taking the skins off moves sweet potatoes into the medium glycemic zone, between about 63 and 66. However, the range is still lower than that of other starches, such as whole wheat bread or instant mashed potatoes.