Potatoes contain two kinds of glycoalkaloids, both natural toxins, called solanine and chaconine. Exposure to light greatly increases the formation of chlorophyll and glycoalkaloids.
Can potatoes become poisonous?
Not to worry though, fatal cases of solanine poisoning are very rare these days. Most commercial varieties of potatoes are screened for solanine, but any potato will build up the toxin to dangerous levels if exposed to light or stored improperly.
How do you know if a potato is poisonous?
Specifically, the color green. The presence of chlorophyll in a potato means that a glycoalkaloid poison named solanine is also present. A defense against insects, this nerve toxin (which is in the nightshade family) can result in headaches, vomiting, diarrhea, and even paralysis if ingested in very high amounts.
More useful articles on a similar topic 👇
Are potatoes ever poisonous?What does a bad potato taste like?
