https://www.verywellfit.com/onions-nutrition-calories-and-health-benefit-4119066
Onion Nutrition Facts and Health Benefits
A medium-sized onion has 44 calories, 1.2g protein, 10.3g carbs, and 0.1g fat. Onions are a solid source of vitamins C and B6, potassium, and folate.
onion nutritionfactshealth
https://www.onions-usa.org/all-about-onions/onion-nutrition/
Onion Nutrition - National Onion Association
onion nutritionnational