The composition of onions includes a large number of various useful substances. These are allicin, vitamin C, B vitamins, quercetin, fiber, iron, potassium, chromium. It is believed that regular consumption of onions can reduce the chances of developing heart disease. And thanks to onions, you can lose weight.
There are many varieties of onions. These include yellow onions (the most common), white onions, red onions, scallions, shallots, sugar onions. The most useful of those listed is red. It contains the most antioxidants and also contains anthocyanins, which have anti-cancer and antioxidant properties.
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Source: Ferra

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