Solanine is a bitter, toxic compound at high levels found in which vegetables?

• A. Onions and potatoes
• B. Carrots and onions
• C. Tomatoes and peppers
• D. Cucumbers and zucchini

Answer: (A)

Solanine is a bitter, toxic glycoalkaloid produced by nightshade plants. In foods, potatoes are the primary source people worry about, especially when potatoes are exposed to light or damaged, which causes the skin to turn green and solanine to concentrate in the skin and sprouts. While other nightshade vegetables like tomatoes and peppers contain related alkaloids, solanine itself is most strongly linked to potatoes. Among the vegetables listed, potatoes are the best-known source of this compound, which is why this option is chosen. To stay safe, avoid eating green or sprouted potatoes, since their solanine levels can be higher. The other vegetables listed are not typically associated with high solanine levels.