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Per 100g
Nutrition data source: USDA FoodData Central
Common measurement equivalents in grams
Whole red onions can last 2 to 3 months in a cool, dark, and dry pantry with good airflow.
Yes, you can freeze chopped red onions in freezer bags for up to 6 months, though they will lose their crunch and are best used in cooked dishes.
Look for onions that are heavy for their size, firm to the touch, and have dry, papery skins without any soft spots or sprouts.
Shallots are the best substitute for raw applications; yellow onions or white onions can be used if cooked.
When cut, onions release a gas called syn-propanethial-S-oxide, which reacts with the moisture in your eyes to form a mild sulfuric acid.
Red onions generally contain higher levels of antioxidants, specifically anthocyanins and quercetin, compared to white or yellow onions.
Cut off the stem and root ends, peel away the papery outer skin and the first fleshy layer if it looks tough, then slice or dice as needed.
They are frequently used in Greek salads, salsas, sandwiches, burgers, and as a garnish for street foods like tacos or chaat.
No, red onions are root vegetables and are excluded from a traditional Jain diet.
raw red onion is a versatile ingredient found in cuisines around the world. With 40 calories per 100g and 1.1 grams of protein, it's a nutritious addition to many dishes.
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View all vegetable →Discover 0 recipes featuring raw red onion with step-by-step instructions.
Browse recipes →A medium red onion (approx. 110g) contains about 44 calories.