This adaptable tuber is popular in South America, Africa, and Asia. (It makes tapioca.) Both sweet and bitter kinds include linamarin, which decomposes into hydrogen cyanide.
Eggplant is a nightshade (deadly nightshade is a cousin) and includes solanine, a bitter steroidal chemical. Solanine overdose can cause nausea, dizziness, and death.
Green beans contain vitamins A, C, and K and come in more than 130 types. A few raw in a salad is fine, but they're mildly hazardous unless cooked.
Red kidney bean poisoning causes nausea, diarrhoea, and stomach pain. Phytohaemagglutinin, found in raw kidney beans, causes this.
Like cassava, raw lima beans contain cyanide-producing linamarin. Commercially sold limas in the US must have lower quantities of the chemical than those grown overseas, & boiling neutralises the toxin.
Potatoes and eggplant contain solanine. Too much can cause nausea, diarrhoea, tachycardia, dizziness, hallucinations, paralysis, and hypothermia.
Rhubarb stalks make great pie (typically mixed with strawberries) and other desserts, but you must remove every leaf before using them. (Wash the stalks too.) While rhubarb is safe & can be used medicinally.
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