Across 3 real meals logged on Fuel Log, meals tagged onion average 496 kcal and 24g protein. Every entry below is a real photographed meal with AI-estimated calories.
A vegetable so universally useful it's basically free seasoning, though it does pack carbs once cooked down—a medium onion runs 45 calories raw, more when caramelized. Watch portion sizes on caramelized versions; they're calorie-dense and sneakily easy to overeat.
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