According to experts, in reality, potatoes always contain a certain amount of solanine – a substance that can cause fatal poisoning at a dosage of 0.2-0.4 grams per 1kg of body weight. This substance is more prevalent in potatoes with green skin and sprouted potatoes.
Peeling and soaking potatoes before cooking is a simple way to reduce the amount of harmful toxins.
After peeling, you should soak the potatoes in water for at least half an hour before cooking to allow the solanine to break down in the water, then rinse them with clean water.
In addition, soaking potatoes in water after peeling also helps them retain their yellow color and appear fresher.
If peeled potatoes are exposed to the air, the starch on the surface will react with air and light, causing them to turn dark. This is also a reason why potatoes should be soaked before cooking.