1 serving (85 grams) contains 40 calories, 1.0 grams of protein, 0.1 grams of fat, and 9.0 grams of carbohydrates.
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Nutrition Information
Calories |
80 | ||
|---|---|---|---|
% Daily Value* |
|||
| Total Fat | 0.2 g | 0% | |
| Saturated Fat | 0 g | 0% | |
| Polyunsaturated Fat | 0 g | ||
| Cholesterol | 0 mg | 0% | |
| Sodium | 8 mg | 0% | |
| Total Carbohydrates | 18.0 g | 6% | |
| Dietary Fiber | 3 g | 10% | |
| Sugars | 8 g | ||
| protein | 2.0 g | 4% | |
| Vitamin D | 0 mcg | 0% | |
| Calcium | 40 mg | 3% | |
| Iron | 0.4 mg | 2% | |
| Potassium | 300 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 Sliced red onions
Red onions, a vibrant variety of Allium cepa, are commonly used in cuisines worldwide for their slightly sweet yet sharp flavor. Originating from Central Asia, they are now widely grown globally and a staple in dishes ranging from salads to stir-fries. Nutritionally, red onions are low in calories, providing just 40 calories per 100 grams. They contain essential nutrients such as vitamin C, B6, folate, and potent antioxidant compounds like quercetin and anthocyanins. With their striking purple-red color, they offer both visual appeal and health benefits to meals.
Health Benefits
- Boosts immunity due to vitamin C, which plays a critical role in white blood cell function.
- Supports heart health with quercetin, an antioxidant known to reduce inflammation and improve cholesterol levels.
- Promotes healthy digestion thanks to dietary fiber, aiding regular bowel movements and gut health.
Dietary Considerations
Selection and Storage
Store whole red onions in a cool, dark place with good ventilation for up to 2-3 months. Once sliced or peeled, refrigerate them in an airtight container and use within 7 days.
Common Questions About Sliced red onions Nutrition
What is the nutritional content of sliced red onions?
Sliced red onions are low in calories, with around 40 calories per 100 grams. They contain approximately 1 gram of protein, 0 grams of fat, and 9.3 grams of carbohydrates, including 4.2 grams of natural sugars. They are also a good source of vitamin C, vitamin B6, and small amounts of potassium and folate.
Can I eat sliced red onions on a keto or low-carb diet?
Yes, sliced red onions can be consumed on a keto or low-carb diet in moderation. While they do contain some carbohydrates (approximately 9.3 grams per 100 grams), their serving sizes are typically small, and their fiber content (1.7 grams per 100 grams) helps offset the net carbs.
What are the health benefits of red onions?
Red onions are rich in antioxidants, particularly quercetin and anthocyanins, which may help reduce inflammation and support heart health. They also contain sulfur compounds that could have potential antimicrobial and immune-boosting properties. Furthermore, their prebiotic fibers support gut health by feeding beneficial gut bacteria.
What is the recommended portion size for sliced red onions?
A standard portion size for sliced red onions is about 1/4 cup, which weighs roughly 25 grams and contains around 10 calories. This amount provides a flavorful addition to meals without significantly impacting calorie or carbohydrate intake.
How do red onions compare to white onions in flavor and nutrition?
Red onions are slightly sweeter and milder in taste compared to white onions, making them a great choice for raw dishes like salads and sandwiches. Nutritionally, red onions have more antioxidants (like anthocyanins) due to their vibrant color, while white onions tend to contain slightly fewer carbs and natural sugars.
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.
- Dietary Polyphenols and Their Role in Reducing Inflammation via Modulation of the Gut MicrobiotaJournal of Nutritional BiochemistryHighlights the health benefits of polyphenols in red onions, such as anti-inflammatory and antioxidant properties.
- Dietary Guidelines for Americans, 2020-2025U.S. Department of Health and Human ServicesRecommends vegetables like onions as part of a healthy diet for their nutrients and health benefits.
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.
