Potatoes contain two kinds of glycoalkaloids, both natural toxins, called solanine and chaconine. Exposure to light greatly increases the formation of chlorophyll and glycoalkaloids. Chlorophyll is responsible for the green color of many plants and is not toxic.
Are potatoes toxic to humans?
The average potato has 0.075 mg solanine/g potato, which is equal to about 0.18 mg/kg based on average daily potato consumption. Calculations have shown that 2 to 5 mg/kg of body weight is the likely toxic dose of glycoalkaloids like solanine in humans, with 3 to 6 mg/kg constituting the fatal dose.
What part of the potato is toxic?
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. So never eat any potato leaves, stems, or sprouts, and it's probably wise to avoid eating any potatoes that have a greenish tint.
Why are potatoes harmful?
Potatoes contain glycoalkaloids, a type of chemical compound found in members of the nightshade family that can be toxic if consumed in high amounts. Potatoes, particularly green potatoes, contain two types of glycoalkaloids: solanine and chaconine.
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