Sweet potatoes have more sugar -- 7 grams -- but about the same amount of starch. When they're digested, both carbohydrates are broken down into the simple sugar glucose. Starches usually take longer to digest, so in most complex carbohydrates they don't cause a boost in blood sugar. read more
The amount of total carbohydrates includes all of the sugar, starch and fiber found in a potato. The total carbohydrates in a medium-sized potato range from 27 grams in red and white potatoes to 34 grams in sweet potatoes and 36.5 grams in russet potatoes. read more