red onion
Also known as: purple onion
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Also known as: purple onion
Per 100g
Nutrition data source: USDA FoodData Central
Common measurement equivalents in grams
A refreshing and colorful salad featuring tender white beans, crisp bell peppers, celery, and red onion, all tossed in a zesty, low-sodium lemon-herb dressing. Perfect as a light lunch or a healthy side.
A crisp and refreshing relish made with diced cucumbers, tomatoes, and red onion, tossed in a tangy vinegar dressing. It's a perfect no-salt topping for grilled meats or salads, ready in minutes.
A crisp and refreshing green salad with cherry tomatoes, cucumber, and red onion, tossed in a classic homemade balsamic vinaigrette. The perfect simple side to any meal, ready in just 10 minutes.
A classic deli favorite, this creamy smoked whitefish salad is perfectly balanced with crisp celery, sharp red onion, and fresh dill. It’s the ultimate topping for a fresh bagel or rye toast.
Yes, red onions are highly nutritious and low in calories, providing only 40 calories per 100g. They are packed with antioxidants like quercetin and anthocyanins, which help reduce inflammation and protect the body against chronic diseases.
Red onions support heart health by helping to lower blood pressure and cholesterol levels. They also contain sulfur compounds with anti-cancer properties and provide Vitamin C, fiber, and folic acid to support immune and digestive health.
Red onions can be included in a keto diet when consumed in moderation. While they contain about 9.34g of carbohydrates per 100g, they are typically used in small quantities as a garnish or flavor enhancer, making their net carb impact manageable.
Yes, red onions are commonly eaten raw in salads, sandwiches, and salsas. They are preferred for raw consumption because they tend to be milder and sweeter than white or yellow onions, though they still retain a crisp texture.
Red onions have a mild to sweet flavor with a slightly spicy finish. They are less pungent than yellow onions, making them ideal for fresh preparations, though they become even sweeter and more mellow when grilled or roasted.
Whole red onions should be stored in a cool, dry, and dark place with plenty of ventilation, where they can last for 2 to 3 months. Once sliced or chopped, they must be refrigerated in an airtight container and used within 7 to 10 days.
A spoiled red onion will feel soft, mushy, or have visible mold or dark spots on the skin. If the onion has a strong, foul odor or has begun to sprout significantly, it is likely past its prime and should be discarded.
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.
Explore more ingredients in the vegetable category with complete nutrition information.
View all vegetable →To mellow the flavor of raw red onions, soak the slices in a bowl of cold water or ice water for 10 to 15 minutes before serving. This process leaches out some of the pungent sulfur compounds while keeping the onion crisp.
Yes, red onions are an excellent addition to a weight loss diet. They are very low in fat and calories while being high in fiber, which helps promote a feeling of fullness and adds significant flavor to meals without the need for high-calorie sauces.
Cutting a red onion breaks its cells, releasing enzymes that produce a volatile gas called syn-propanethial-S-oxide. When this gas reaches the moisture in your eyes, it creates a mild sulfuric acid, which triggers tears as a natural defense mechanism to flush the irritant away.
