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Onion

Vegetables · Alliums · per 100 g

A wholesome vegetable packed with essential vitamins, minerals, and dietary fiber. Important for digestive health and disease prevention.

Nutrient density 5.0GI LowStaple food

Macronutrients

Calories40 kcal 2% DV
Protein1.1 g 2% DV
Carbohydrates9.3 g 3% DV
Fat0.1 g 0% DV
Fiber1.7 g 6% DV
Total sugars4.2 g no %DV*
Sodium4.0 mg 0% DV

Vitamins & minerals

Vitamin A0.0 µg 0%
Vitamin C7.4 mg 8%
Vitamin D0.0 µg 0%
Vitamin E0.02 mg 0%
Vitamin K0.4 µg 0%
Thiamin B10.05 mg 4%
Riboflavin B20.03 mg 2%
Niacin B30.12 mg 1%
Vitamin B60.12 mg 7%
Folate B919 µg 5%
Vitamin B120.0 µg 0%
Calcium23 mg 2%
Iron0.21 mg 1%
Magnesium10 mg 2%
Phosphorus29 mg 2%
Potassium146 mg 3%
Zinc0.17 mg 2%
Selenium0.5 µg 1%

Common serving sizes

ServingWeight
1 medium110 g
1 cup chopped160 g

Best timing around exercise

Any time — best with main meals. Avoid large servings of raw cruciferous pre-workout (gas risk)

Educational reference only. Values are per 100 g from the app's reference database; % Daily Value uses the FDA 2,000-calorie reference. Not medical or dietary advice. See our full disclaimer.
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Nutritional composition of Onion — FAO/INFOODS, 2023