Nightshades are a group of plants belonging to the Solanaceae family, which includes a variety of species, some of which are edible and others that are toxic. Common edible nightshades include tomatoes, potatoes, eggplants, and bell peppers, all of which are staples in many cuisines around the world. While many nightshades are safe to eat, some, like deadly nightshade (Atropa belladonna), are highly toxic. Nightshades contain alkaloids, which can affect some individuals, leading to sensitivities or allergic reactions. Understanding the differences between edible and toxic nightshades is essential for safe consumption.