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onion

Onions are nutrient-dense. They’re low in calories but high in vitamins, fiber, and minerals.

One medium onion, or an onion weighing 110 grams (g)Trusted Source, contains the following:

  • Calories: 44
  • Protein: 1.2 g
  • Carbs: 10.3 g
  • Sugar: 4.66 g
  • Fiber: 1.87 g
  • Fat: 0.1 g
  • Potassium: 161 milligrams (mg)
  • Vitamin C: 8.14 mg
onion