The green color that forms on the skin is actually chlorophyll which isn't toxic but indicates the presence of the toxin solanine which is a defense mechanism against pests.

土豆皮上绿上是叶绿素，它是无毒，但这表明有毒素茄碱存在，这是一种防御机制。

All potatoes contain two natural toxins called solanine and chaconine.

所有土豆都含有两种天然毒素， 称为龙葵碱和查茄碱。