Glycoalkaloids are a family of poisons commonly found in the plant species Solanum dulcamara (nightshade).(External Link) There're several glycoalkaloids (alkaloids + sugars) that're potentially toxic. A prototypical glycoalkaloid's called solanine (sugar [solanose] + alkaloid [solanidine] = solanine), which's found in potatoes. The alkaloidal portion of the glycoalkaloid's also generically referred to as an aglycone. The intact glycoalkaloid's poorly absorbed from the GI tract but causes GI irr… (More on Glycoalkaloid)