Many people believe that fruit and vegetable peels contain a large number of nutrients, so they eat the peels when consuming any fruits or vegetables. However, the peels of some fruits and vegetables can easily cause illness or poisoning when consumed, so these peels should be avoided. Potato Peel
Potato peels contain "solanine," which accumulates in the body and can cause poisoning when it reaches a certain level. Because the poisoning caused by it is chronic and its symptoms are not obvious, it is often overlooked. When stewing beef with potatoes, the different concentrations of gastric acid required for digesting these two foods will prolong the time food stays in the stomach, extending the time for gastrointestinal digestion and absorption, and causing discomfort to the stomach and intestines. Persimmon Peel
When persimmons are unripe, tannic acid is mainly found in the pulp, but after ripening, it concentrates in the peel. After entering the human body, tannic acid reacts with proteins in food under the action of gastric acid to form a precipitate—bezoar, which can cause various diseases. [Food Forum] Sweet Potato Peel
Sweet potato peels contain a high amount of alkali, and consuming too much can cause gastrointestinal discomfort. Sweet potato peels that are brown or have dark brown spots are infected with "black spot bacteria," which can produce "ipomeamarone" and "ipomeamarol." When these enter the human body, they can damage the liver and cause poisoning. In mild cases of poisoning, symptoms include nausea, vomiting, and diarrhea. In severe cases, it can lead to high fever, headache, shortness of breath, convulsions, vomiting blood, coma, and even death. Water Chestnut Peel
Water chestnuts often grow in paddy fields, and their peels can accumulate harmful and toxic biological waste and chemicals. Additionally, water chestnut peels also contain parasites. Eating unwashed water chestnut peels can lead to disease. [Food China] Ginkgo Peel
The peel contains toxic substances such as "ginkgolic acid," "ginkgolic acid," "ginkgolic acid," and "ginkgol," which can damage the central nervous system and cause poisoning after entering the human body. In addition, the cooked flesh of ginkgo should not be consumed in large quantities.