1, purple potato+persimmon: eating purple potato and persimmon together will produce sediment, which will seriously lead to gastric bleeding or gastric ulcer.

2, purple potato+tomato: the acidic substances in tomato easily react with purple potato, forming substances that are difficult for the human body to absorb, causing diarrhea and abdominal pain.

3, purple potato+crab: purple potato and crab are cold foods, eating together is easy to cause diarrhea and allergies.

4. Purple potato+liquor: Alcohol in liquor and starch in purple potato will react together to produce toxic substances, which are harmful to human health.

5, purple potato+too sweet food: Because the sugar in purple potato is very high, eating with too sweet food will cause reflux.