1. Potato
Potato peel contains glycoalkaloid, which will cause poisoning when accumulated to a certain amount in the human body. The poisoning has always been neglected because it is slow in taking effect and has no obvious symptom.
Potatoes cannot be cooked with beef. The consistency of the gastric acid for digesting these two kinds of food are different, which will prolong their detention time in the stomach and cause stomach upset.
