Onions are far more than flavor; they are patient guardians working in the background of your life. Their quercetin, fisetin, sulfur compounds, and vitamin C help shield cells from free radicals, calming the chronic inflammation that quietly feeds cancers of the stomach and colon. With steady use, they can support more elastic blood vessels, gentler blood sugar swings, sturdier bones in aging bodies, and a sharper immune response when infections circle close.

Yet their power cuts both ways. For most people, 30–50 grams a day is enough to gain benefits without overloading a sensitive gut. Those with ulcers, eye inflammation, or low blood pressure need to listen closely to their bodies and speak with a professional if discomfort deepens. In the end, it isn’t the onion itself that decides your future, but how, how often, and how carefully you choose to use it.