una cebolla cruda low in calories low in calories Onions SelfNurtitionData NutritionData.Self large white onions large white onions onion SelfNurtitionData large white onions onion Onions large white onions http://nutritiondata.self.com/facts/veg ... cts/2501/2 Onions 1 thin slice onion good nutrient profile low in calories Onions source