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White Onion

White Onion
By Foodbe.ai · June 22, 2026

White onions are known for their pungent and sharp flavor, which can be attributed to their high sulfur content. This characteristic not only contributes to their distinctive taste but also plays a role in health, as they may support anti-inflammatory processes in the body. With only 40 calories per 100 grams, they offer a low-calorie option that can add depth to various dishes while providing beneficial prebiotic fiber.

Historically, onions have been a staple in many cultures around the world, valued not just for their flavor but also for their practical uses. One interesting method involves placing a cut white onion in a container with a cut avocado, which releases sulfur compounds that inhibit the browning enzyme in the avocado. This clever storage trick highlights the onion's versatility and its role in food preservation, showcasing its long-standing presence in culinary practices.

When cooking with white onions, their sharpness can be tempered through techniques like sautéing or caramelizing. Sautéing them quickly over medium heat allows their natural sweetness to emerge while softening their pungency. For a richer flavor, caramelizing white onions slowly brings out their sugars, resulting in a deep, complex taste that enhances a variety of dishes. Mastering these techniques will allow you to fully appreciate the unique qualities of white onions.

🌱 Diets
ketogenicomnivorepaleopescatarianveganvegetarian
🦠 Gut health
prebiotic fodmap
😋 Flavor
pungentsharpsulfuric
♻️ Environmental Impact
🔋 Charging phone 24x🚽 1 toilet flush

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About this article

Foodbe.ai exists to inform consumers about the food they buy and eat. Every claim is cited. Sources: NIH, USDA, FDA, Smithsonian, and JSTOR.

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Nutrition per 100g
Calories40
Protein1.1g
Fat0.1g
Sat fat0g
Fiber1.7g
Sugar4.2g
Sodium3mg
Cholesterol0mg
Iron0.2mg
Vitamin C7.4mg
Vitamin D0mcg
AllergensNo major allergens
Storage
Shelf — 6mo
Swaps
Yellow OnionRed OnionShallots