Onions, raw Nutrition Facts
Summary: 40 calories per 100 g serving. Net carbs: 7.6 g (total carbs 9.3 g – fiber 1.7 g) – not keto friendly. Contains 1.1 g protein and 0.1 g fat.
Raw onions are crisp, pungent, and surprisingly light, with just 40 calories per serving. They add a sharp bite to salads, sandwiches, and salsas without weighing a dish down.
They’re very low in fat at 0.1g, with 9.3g carbs and 1.1g protein. A serving also gives 1.7g fiber, which helps make them a little filling.
With 4.2g sugar per serving, raw onions have a mild natural sweetness beneath their bite. That balance makes them especially tasty when sliced thin and eaten fresh.
Onions, raw
Serving size: 100 g
Calories40kcal
Net Carbs7.6g
Protein1.1g
Fat0.1g
Where do the calories come from?
Protein 10%
Carbs 88%
Fat 2%
What is this food made of?
Water 89%
Protein 1%
Carbs 9%
Fat 0%
Blood Sugar Index12Low
Inflammation Score1Low
PRAL Score0.54Acidic
Amino Acid Score4%Incomplete
Detailed Nutrition Facts
Macronutrients
| Calories (kcal) | 40 | 2% | |
| Fat | 0.1 g | 0% | |
| Saturated Fat | 0 g | 0% | |
| Trans Fat | 0 g | — | |
| Cholesterol | — | — | |
| Sodium | |||
| 4 mg | 0% | ||
| Total Carbohydrate | 9.3 g | 3% | |
| Dietary Fiber | |||
| 1.7 g | 7% | ||
| Total Sugars | 4.2 g | — | |
| Protein | 1.1 g | 2% |
Vitamins
| Vitamin B-6 | 0.1 mcg | — |
| Vitamin E (alpha-tocopherol) | 0 mcg | — |
| Vitamin C, total ascorbic acid | 7.4 mg | 12% |
| Vitamin K (phylloquinone) | 0.4 mcg | — |
| Vitamin A, IU | 2 mcg | — |
Source: USDA FoodData Central