1 serving (55 grams) contains 22 calories, 0.6 grams of protein, 0.1 grams of fat, and 5.1 grams of carbohydrates.
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Nutrition Information
Calories |
66 | ||
|---|---|---|---|
% Daily Value* |
|||
| Total Fat | 0.3 g | 0% | |
| Saturated Fat | 0 g | 0% | |
| Polyunsaturated Fat | 0 g | ||
| Cholesterol | 0 mg | 0% | |
| Sodium | 6.0 mg | 0% | |
| Total Carbohydrates | 15.3 g | 5% | |
| Dietary Fiber | 2.7 g | 9% | |
| Sugars | 6.9 g | ||
| protein | 1.8 g | 3% | |
| Vitamin D | 0 mcg | 0% | |
| Calcium | 48 mg | 3% | |
| Iron | 0.3 mg | 1% | |
| Potassium | 306.0 mg | 6% | |
* Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
Food Attributes
Source of Calories
About Half an onion
Onions, originating thousands of years ago in Central Asia, are a staple vegetable in cuisines worldwide, including Indian, Mediterranean, and French. Half an onion, typically around 50-70 grams, provides approximately 20-30 calories, primarily from natural carbohydrates. It contains a small amount of dietary fiber (about 1 gram) and is rich in antioxidants such as quercetin. Onions also offer essential micronutrients like vitamin C, vitamin B6, manganese, and small amounts of potassium. These compounds make onions a versatile and nutrient-rich addition to various dishes, while their pungent flavor enhances both cooked and raw recipes in salads, soups, stews, and sautés.
Health Benefits
- Supports immune function due to vitamin C, which aids in collagen formation and immune defense.
- Contains quercetin, a natural antioxidant flavonoid, which may help reduce inflammation and support heart health.
- Naturally low in calories and rich in dietary fiber, promoting digestive health and aiding in weight management.
Dietary Considerations
Selection and Storage
Store whole onions in a cool, dry, and well-ventilated place. Once cut, wrap the onion tightly and refrigerate, using it within 7 days.
Common Questions About Half an onion Nutrition
What is the nutritional content of half an onion?
Half an onion (about 55 grams) contains approximately 20 calories, 0.5 grams of protein, 4.8 grams of carbohydrates, and 1.2 grams of dietary fiber. It also provides vitamins such as vitamin C (approximately 6% of the recommended daily intake) and small amounts of B vitamins and potassium.
Can I eat half an onion on a keto diet?
Yes, you can eat half an onion on a keto diet but in moderation. While onions contain some carbohydrates (about 4.8 grams in half an onion), their net carbs are lower due to their fiber content, making them suitable for keto when properly portioned.
What are the health benefits of eating half an onion?
Onions are rich in antioxidants, like quercetin, which may support heart health and reduce inflammation. Additionally, they are a good source of vitamins like vitamin C, which supports immune function and skin health, and compounds thought to have antibacterial properties.
What is a recommended serving size for onions?
A typical serving size is about half an onion (55-85 grams) for recipes, which adds flavor and nutrients without overwhelming with calories or carbs. For raw consumption, smaller portions may be preferred due to their strong taste.
How does half an onion compare to other vegetables in recipes?
Half an onion adds a savory and slightly sweet flavor, making it a versatile ingredient compared to milder vegetables like celery or zucchini. It caramelizes well for sweeter dishes and has a stronger flavor when raw, ideal for salads or salsas.
Data Sources & Scientific References
Our nutrition data comes from trusted, authoritative sources to ensure accuracy and reliability. Below are specific scientific references and authoritative sources for this food item.
Additional Authoritative Sources:
Daily value percentages based on FDA guidelines. Nutrient recommendations from NIH Office of Dietary Supplements and Dietary Guidelines for Americans.
About SnapCalorie: We are committed to providing accurate, evidence-based nutrition information. Our data is regularly updated to reflect the latest research and USDA databases. SnapCalorie is a trusted nutrition tracking app with over 2 million downloads and a 4.8/5 star rating.
