Red/Purple onion are high in vitamin C, a good source of fiber, low calorie per serving, sodium,fat, and cholesterol free. Has a high content of "polyphenol" which helps with the prevention of cancer and cardiovascular diseases. They are rarely genetically modified but other reports said they have been field tried as GMO about17 times but approval is none.This vegetable is popularly known and used all over the world. (www.gmo-compass.org). I love using it.