2. Because sweet potato is rich in starch, it will provide energy after being converted into glucose, so choose purple potato to lose weight. Sweet potato is rich in starch, which can be converted into glucose and provide energy for human body, so it is better to stay away from sweet potato if you want to lose weight. Purple sweet potato contains not only the nutrients of ordinary sweet potato, but also some hydrogen and anthocyanins. Anthocyanin is an antioxidant, which has a good effect on preventing many diseases and is very helpful for treating cancer and cardiovascular diseases. Therefore, purple sweet potato has stronger anticancer ability to sweet potato. Purple potato can be eaten as breakfast and has a good feeling of fullness. Especially suitable for cleaning the stomach after eating big fish and meat, to avoid the body absorbing too much oil, so friends who lose weight can eat more purple potatoes. However, for some patients with a history of gastric ulcer, it is recommended to eat purple potatoes after meals.