Of course it is sweet potato (sweet potato). 500 grams of sweet potato can produce about 635 kcal of heat energy. Some data say: "Eating sweet potatoes will make people fat. This statement has no scientific basis. In fact, sweet potatoes not only do not make people fat, but are also an ideal weight loss food. Its calorie content is very low and is lower than ordinary rice. It is much lower, so you don’t have to worry about gaining weight after eating it. Instead, it can play a role in losing weight. Sweet potatoes also contain a substance similar to estrogen, which has a certain effect on protecting human skin and delaying aging. Therefore, many foreign women consider it. Sweet potato is used as a beauty food. "I can't say that. The calories of corn per 100 grams are 196 kcal. Corn is higher than wheat, rice, and higher than potato, so it is the first choice basic feed for pigs.