Other causes of stomach rumbles: 1  Incomplete digestion of food can lead to excess gas in the intestine. 2  Louder rumbles may occur when one is hungry. 3  Stomach rumbles can form further along the gastrointestinal system when air is swallowed while talking, eating, and drinking.
One cup of raw yams contains about 158 calories, whereas 1 cup of raw sweet potatoes contains about 114 calories. Therefore, yams contain about 44 more calories than sweet potatoes for an equal portion.
By that reckoning, sweet potatoes pose a challenge: One large baked sweet potato provides over 37 grams of carbs, which represents most of your allowance for that meal. By that measure, incorporating a sweet potato can sharply limit what else goes onto your plate.