Can the yam skin be eaten?

Many foods are wrapped in skins. The skins of some foods are edible and are more nutritious than the flesh. However, the skins of some foods contain slight toxins, which can cause harm to the body if eaten, so everyone must not eat them indiscriminately. So can sweet potato skin be eaten? It is understood that the skins of several kinds of food cannot be eaten, such as the potatoes and persimmons that we often eat. Let’s learn more about it in detail.

1. Five kinds of food that cannot be eaten with the skin

1. Potato skins

Potatoes contain glycosides, and these toxic substances are almost entirely concentrated in the potato skin. If consumed in large quantities, it can cause symptoms such as vomiting, dizziness, and diarrhea. Some people like to eat beef with potatoes in the skin, but even after the potatoes in the skin are cooked, they still contain glycosides. Even if you peel the potatoes after cooking, the toxic substances will seep into the potatoes and cause food poisoning.

2. Persimmon peel

The peel of ripe persimmon contains a large amount of tannic acid, which tastes "astringent". Under the action of gastric acid, tannic acid will react with the protein in food to form a precipitate, namely persimmon stone. This substance can easily cause symptoms such as upper abdominal discomfort, fullness, and loss of appetite. Therefore, do not eat unpeeled persimmons, and do not eat persimmons on an empty stomach.

3. Sweet potato skin

Sweet potatoes grow underground for a long time, and their skin is in direct contact with the soil, so many harmful substances are absorbed into the sweet potato skin. Moreover, sweet potato skin contains a lot of alkali, and eating too much can cause gastrointestinal discomfort. In order to save costs, some stall owners who sell roasted sweet potatoes use coke as fuel. The harmful substances such as sulfur dioxide produced are also easily deposited in the sweet potato skin, and eating the skin can easily cause cancer.

4. Water chestnut skin

Water chestnuts often grow in paddy fields. Their skins absorb a lot of harmful and toxic biological excrement and also contain parasites. If you eat water chestnut skin raw, it will cause diarrhea, vomiting and other uncomfortable symptoms. In addition, it should be noted that water chestnuts contain a lot of starch, so diabetic patients should eat them with caution.

5. Ginkgo Biloba Bark

The peel contains toxic substances such as "ginkgolic acid", "hydrogenated ginkgolic acid", "hydrogenated ginkgolic acid" and "ginkgol", which can damage the central nervous system and cause poisoning after entering the human body. In addition, it is not advisable to eat too much cooked ginkgo meat.

To reduce pesticide residues, it is best to scrub the fruits and vegetables vigorously under the tap first. Fruits and vegetables with a "firm" appearance can also be scrubbed with a small brush. Once you feel they are clean, rinse them with water for 15 to 20 seconds and you can eat them with confidence. Soaking in tap water can also remove some pesticide residues, but don't soak for too long, 10 minutes is appropriate.