Here are 5 things that we eat so often, but never expected that their skins could cause chronic damage to our internal organs. Come and take a look to see what these foods are!
1. Sweet Potato Skin Harms the Liver
Sweet potatoes (also known as yams) are in direct contact with the soil for a long time, and many harmful substances are absorbed into the skin. The skin contains a high amount of alkaline, and eating too much can cause gastrointestinal discomfort. Furthermore, sweet potato skins with brownish-black or black spots are infected with "black spot bacteria," which can produce "ipomeamarone" and "ipomeamarol." When ingested, these substances can damage the liver and cause poisoning.
Additionally, some vendors who roast sweet potatoes use charcoal to save costs, and harmful substances like sulfur dioxide can easily deposit on the sweet potato skin.
2. Potato Skin Causes Chronic Poisoning
Peeling potatoes can be a hassle! But you must not be careless. Potato skins contain glycoalkaloids, and this toxic substance is almost entirely concentrated in the skin. Ingesting it can cause poisoning.
Because it's a chronic poisoning, there may be no immediate symptoms or the symptoms may not be obvious, so it often goes unnoticed. However, the harm to the body is significant. Potatoes that have sprouted or have a green skin contain even higher levels of toxins and should be absolutely forbidden from consumption.
Furthermore, some people like to cook potatoes with their skins on beef. Even when cooked, the glycoalkaloids remain in the skin! Even if you peel them after cooking, the toxic substances will have seeped into the potato flesh, which can also cause food poisoning.
3. Persimmon Skin Harms the Stomach
Medical research has shown that tannic acid, which can harm the digestive tract, is mainly found in the flesh of unripe persimmons. When the persimmon ripens, the tannic acid concentrates in the skin, which is why the skin of a ripe persimmon has a astringent taste.
In the stomach acid, the tannic acid in persimmons reacts with proteins in food to form a precipitate known as a persimmon stone. This can easily cause upper abdominal discomfort, bloating, and loss of appetite. Therefore, do not eat unpeeled persimmons, and do not eat them on an empty stomach.
4. Ginkgo Skin Harms the Nervous System
The ginkgo nut skin contains toxic substances such as "ginkgolic acid," "ginkgolic acid," "ginkgolic acid," and "ginkgol." When ingested, these substances can damage the central nervous system and cause poisoning. In addition, the cooked ginkgo nut flesh should not be eaten in large quantities.
5. Water Chestnut Skin Contains Parasites
Water chestnuts often grow in paddy fields, and their skins can contain parasites or eggs. If you eat an unwashed water chestnut skin raw, it can lead to illness.