Onions vary in size, shape, color, and flavor. The most common varieties are red, yellow, and white. The flavor of these vegetables can range from sweet and savory to sharp, spicy, and pungent, often depending on the season in which they are grown and consumed. According to the Food and Agriculture Organization of the United Nations, China is the world’s largest producer of onions. In this article, we discuss 9 impressive health benefits of onions, their nutritional content, and how to prepare them.