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Vegetables · Nutrition Facts

Sweet Onion Nutrition Facts

Sweet onions are a type of bulb onion known for their mild, sweet flavor. They are lower in sulfur compounds than regular onions, which contributes to their milder taste and higher sugar content.

Low GIServing: 1 medium sweet onion (100g)Search USDA matchesPublic dataset · 4,000 foods

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40kcal

Calories

1.1g

Protein

8.5g

Carbs

0.2g

Fat

Where the calories come from

Protein11%
Carbs85%
Fat4%

Full nutrition breakdown

Nutrition Facts

Per 100g · Per serving (1 medium sweet onion, 100g)

NutrientPer 100gPer serving
Calories40kcal40kcal
Protein1.1g1.1g
Total Carbohydrates8.5g8.5g
Dietary Fiber1.2g1.2g
Sugars5.5g5.5g
Total Fat0.2g0.2g
Saturated Fat0.1g0.1g
Sodium4mg4mg
Water86.5g86.5g

Adjust the serving size

Estimate nutrients in a portion of Sweet Onion. The calculation scales the values shown per 100 g; it is not a measurement of a specific food or product.

Listed serving: 1 medium sweet onion (100 g). Enter 1–5000 g.

Calories
40 kcal
Protein
1.1 g
Carbohydrates
8.5 g
Fiber
1.2 g
Sugars
5.5 g
Fat
0.2 g
Sodium
4 mg

Estimate only. Food varieties, brands, preparation, and actual portion weights can change the values. Use product packaging for packaged foods.

Key vitamins & minerals

Vitamin C8.4 mg

9% Daily Value

Calcium13 mg

1% Daily Value

Iron0.4 mg

2% Daily Value

Magnesium10 mg

2% Daily Value

Serving ideas

  • Grilled and used as a topping for burgers or sandwiches.
  • Sliced raw and added to salads for a sweet crunch.
  • Roasted with other vegetables for a flavorful side dish.

Storage

Storage tip: Store sweet onions in a cool, dry place or in the refrigerator to maintain freshness.

Record status

This page presents a record from our public dataset. It has not been independently verified by a nutrition professional.

Source context

No exact USDA record match has been verified for this food. Search results may include candidates that do not match the exact record or values shown. Read our methodology.

Correction status

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Frequently asked questions

Are sweet onions low in calories?
Yes, sweet onions are low in calories, with only 40 calories per 100 grams.
How do sweet onions benefit the immune system?
Sweet onions are rich in Vitamin C, which helps support the immune system and protect against infections.
Can sweet onions be used in place of regular onions?
Yes, sweet onions can be used in most recipes that call for regular onions, but they may require less cooking time due to their sweetness.

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