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Per 100g
Nutrition data source: USDA FoodData Central
Common measurement equivalents in grams
Yes, raw yellow onions are highly nutritious and low in calories. They are an excellent source of Vitamin C for immune health and contain powerful antioxidants like quercetin that help reduce inflammation and protect cells from damage.
Yellow onions contain sulfur compounds linked to heart health and cancer prevention. They also provide prebiotic fibers like inulin, which support a healthy gut microbiome, and antioxidants that may help lower blood pressure and cholesterol.
A 100g serving of raw yellow onion contains approximately 40 calories and 9.3g of carbohydrates. It is a low-fat food with only 0.1g of fat and provides about 1.1g of protein.
Yellow onions can be included in a keto diet when used in moderation. While they contain about 9.3g of carbs per 100g, the amount typically used for seasoning or as a garnish is small enough to fit within daily carb limits.
Yes, yellow onions are a natural plant-based vegetable. They are naturally vegan, gluten-free, and free from common allergens, making them suitable for almost any dietary restriction.
Raw yellow onions have a sharp, pungent, and slightly spicy flavor with a hint of underlying sweetness. They are more flavorful and complex than white onions, though their bite can be quite strong when eaten completely raw.
Yellow onions can be eaten both raw and cooked. Eating them raw preserves the highest levels of sulfur compounds and Vitamin C, though soaking them in cold water before serving can help mellow their sharp flavor for salads or sandwiches.
raw yellow 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 →Discover 10 recipes featuring raw yellow onion with step-by-step instructions.
Browse recipes →Whole yellow onions should be stored in a cool, dry, and dark place with plenty of ventilation, such as a pantry or cellar. Avoid storing them in plastic bags or near potatoes, as this can cause them to sprout or rot faster.
Whole yellow onions can last 1 to 2 months if stored properly in a cool, dry environment. Once sliced or chopped, they should be kept in an airtight container in the refrigerator and used within 7 to 10 days.
Cutting an onion breaks its cells, releasing enzymes that react to form 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 your tear ducts to flush it out.