Old Wives' Tales
Radio & TV
Toxin du jour
Claim: Green potatoes are poisonous.
Origins: The potato, the ultimate comfort food in Western society, has a disturbing secret. This trustworthy old friend so often invited to our tables can, at times, slip us a little bit of poison.
The potato — or, rather, green versions of it — contains a natural toxin called solanine. The greenish hue that should warn you away from such spuds is actually chlorophyll, but its presence indicates concentrations of solanine are present in the tuber.
A glycoalkaloid poison found in species of the nightshade, solanine is a nerve toxin produced in the green part of the potato (the leaves, the stem, and any green spots on the skin). This bitter poisonous crystalline alkaloid is part of the plant's defenses against insects, disease, and predators. Potato leaves and stems are naturally high in glycoalkaloids, so ingestion of these parts of the plant must be avoided at all costs.
Solanine develops in potatoes
However, unless you are deliberately seeking out green potatoes to eat, you are unlikely to ingest enough of the toxin to do harm. The potatoes we buy contain such a minute amount of the chemical that a healthy adult would have to eat about
Contemporary lore contains a well-traveled tale that expounds on a different danger a green potato might pose:
[Brunvand, 1993]As to whether the preceding is a true story, as noted South African folklorist Arthur Goldstuck said of it: "This story is uniquely 1970s South African. Or 1960s Saigon. Or 1940s France."
During the 1976 Soweto uprising, a bunch of township youths paint a potato green. As an armoured car rolls past them, with a soldier sitting in the turret, they lob the "grenade" into the car. All the soldiers inside scramble out, sans weapons, and the youths leap in and commandeer the vehicle. The story is, naturally, hushed up by the authorities.
Barbara "have spud, will travel" Mikkelson
Last updated: 23 November 2006
This material may not be reproduced without permission.
snopes and the snopes.com logo are registered service marks of snopes.com.