If you don't blanch these 6 types of food, you could be in danger!

Water chestnut
Water chestnuts are a sweet and delicious aquatic plant that is usually used in cold dishes or added to soups. They have the effects of clearing heat and detoxifying, moisturizing the lungs and relieving cough.
However, raw water chestnuts contain a certain amount of tannic acid, a substance that can irritate the gastrointestinal tract. Eating raw water chestnuts directly may cause discomfort such as abdominal pain and bloating.
Tannins can irritate the gastrointestinal mucosa, and long-term consumption of unprocessed water chestnuts can have adverse effects on gastrointestinal health.
To ensure food safety, water chestnuts should be thoroughly blanched before consumption. This removes the tannins and reduces irritation to the gastrointestinal tract.
Blanching water chestnuts results in a fresher taste and a more tender texture, and it won't put any burden on the gastrointestinal tract.