Potatoes can be eaten when they are blue. For some potatoes that turn green, all the green parts can be cut off before eating. If potatoes turn green seriously and penetrate deep into the interior, it is best not to eat them. Solanum nigrum is the most abundant in potato skins that are green or sprout in the sun. Some people are too lazy to peel potatoes, or they don't pay attention to the potato skin turning green or sprouting, so even if cooked, solanine will still remain in the potato skin.

Generally speaking, potatoes with little germination can be eaten by thoroughly digging out the buds and the parts around the bud eyes and removing the green parts. If the green area of potatoes is large and there are many sprouting parts, they should be thrown away.

Extended data:

When potatoes turn blue and green, solanine will be produced. Solanine is a kind of substance with bitter taste, which mainly exists in the flowers and leaves of potato plants and can play a role in preventing pests. However, the content of solanine in potato pieces is very small, so it is usually safe for us to eat potatoes.

When buying potatoes, it is best not to buy green potatoes, and when storing potatoes, we must also pay attention to keeping them away from light. Because everyone's physique is different, if the potatoes at home turn green, it is better to throw them away if you are really not sure.

People's Daily Online-Can't the potato skin be eaten after it turns green? Experts dispel doubts