Tomatoes, Green (raw Potatoes): These foods are members of the Solanaceae family of plants, which includes the Deadly Nightshade, and contain a bitter, poisonous alkaloid called Glycoalkaloid Solanine, which can cause violent lower gastrointestinal symptoms. (cozycatcottage.org)
Changes in glycoalkaloids content of potatoes destined for consumption (2008) Food Chemistry, 106 (2), pp. 706 - 711. (westonaprice.org)
They contain a bitter, poisonous alkaloid called glycoalkaloid solanine that can cause violent lower gastrointestinal symptoms. (messybeast.com)