One of the most notable qualities of onions is their antioxidant content. They are rich in plant compounds known as flavonoids, including quercetin, which help the body manage everyday oxidative stress. Onions belong to the Allium family, alongside garlic, leeks, and shallots—vegetables that have long been studied for their potential health-supporting properties. Red and yellow onions, in particular, tend to contain higher levels of these beneficial compounds compared to white varieties.
