Plants in the Solanaceae family are informally referred to as nightshade plants. Onions, including red onions, are not in the Solanaceae or nightshade family. While the potato and tomato are common foods around the world, some in this family, like the black nightshade plant (Solanum nigrum), are extremely toxic.Click to see full answer. Correspondingly, what are the nightshade foods?Commonly eaten nightshades include tomatoes, peppers, potatoes and eggplant. The most popular nightshades ? potatoes, tomatoes and peppers ? are rich in nutrients and are often recommended to support a healthy lifestyle. Peppers, for example, are rich in Vitamin C and help the body absorb iron.Secondly, what are nightshade vegetables and why are they bad? Nightshades contain an alkaloid called solanine, which is toxic in high concentrations. Solanine is found in trace amounts in potatoes and is normally safe, though the leafy stalks of the potato plant and green potatoes are toxic, and solanine poisoning has been reported from eating green potatoes. Secondly, is spinach a nightshade? Consume citrus fruits: Many nightshade vegetables contain vitamin C, but citrus fruits like oranges, tangerines and grapefruit are also excellent sources. Eat more leafy greens: Leafy green vegetables like spinach, kale and collard greens are great sources of many vitamins, minerals and dietary fiber.Are sweet potatoes a nightshade?Members of the family Solanaceae, common nightshades include white (but not sweet) potatoes, eggplant, tomatoes, and peppers, both the eye-watering chilies and the sweeter bell peppers. The list of edible nightshades is fairly short, but the list of poisonous ones is quite extensive.

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