Nutrition Facts of an Onion
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A medium onion (about 110 grams) typically contains the following nutrients:
Calories: 44 kcal
Water: 89.11 g
Protein: 1.21 g
Total Fat: 0.16 g
Carbohydrates: 10.27 g (Dietary Fiber: 1.9 g, Sugars: 4.73 g)
Vitamins:
Vitamin C: 7.4 mg
Vitamin B6: 0.12 mg
Folate (B9): 19 mcg
Minerals:
Calcium: 23 mg
Iron: 0.21 mg
Magnesium: 10 mg
Phosphorus: 29 mg
Potassium: 146 mg
Sodium: 4 mg
Onions are a good source of vitamins and minerals, particularly vitamin C, which is an antioxidant and is necessary for the repair of tissues and the absorption of iron.
Please note that the exact nutritional content can vary based on the size of the onion, its variety, and how it is prepared and cooked.