1 serving (100 grams) contains 40 calories, 1.1 grams of protein, 0.1 grams of fat, and 9.3 grams of carbohydrates.
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Nutrition Information
Calories |
60 | ||
|---|---|---|---|
% Daily Value* |
|||
| Total Fat | 0.1 g | 0% | |
| Saturated Fat | 0 g | 0% | |
| Polyunsaturated Fat | 0 g | ||
| Cholesterol | 0 mg | 0% | |
| Sodium | 6 mg | 0% | |
| Total Carbohydrates | 13.9 g | 5% | |
| Dietary Fiber | 2.5 g | 8% | |
| Sugars | 6.3 g | ||
| protein | 1.6 g | 3% | |
| Vitamin D | 0 mcg | 0% | |
| Calcium | 34.5 mg | 2% | |
| Iron | 0.3 mg | 1% | |
| Potassium | 219 mg | 4% | |
* 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 Purple onion
The purple onion, also known as red onion, is a vegetable variety in the Allium family, typically used in raw and cooked cuisines worldwide. Native to Central Asia, purple onions are now cultivated globally and are prized for their mildly sweet yet slightly sharp flavor. They are a low-calorie food, providing about 40 calories per 100 grams, and are rich in vital nutrients such as vitamin C, dietary fiber, and antioxidants like anthocyanins. These onions are also a natural source of sulfur compounds, which contribute to their distinctive aroma and taste, as well as potential health benefits.
Health Benefits
- Supports immune health due to its vitamin C content, an antioxidant that helps protect against cellular damage and boosts immunity.
- Promotes heart health through anthocyanins, which may reduce inflammation and improve heart function.
- Aids in digestion with dietary fiber, which supports gut health and promotes regular bowel movements.
Dietary Considerations
Selection and Storage
Store whole purple onions in a cool, dry, and well-ventilated area to prevent spoilage. Once cut, refrigerate in an airtight container and use within a week.
Common Questions About Purple onion Nutrition
What is the nutritional content of a purple onion?
A medium-sized purple onion (about 110g) contains approximately 44 calories, 1g of protein, 0.1g of fat, and 10g of carbohydrates, including 1.9g of fiber and 4.7g of natural sugars. It is also a good source of vitamin C, vitamin B6, and manganese, while offering antioxidants like anthocyanins.
Can I eat purple onions on a keto diet?
Yes, purple onions can be eaten on a keto diet in moderation, as they contain about 10g of carbs per medium onion with 1.9g being fiber. Due to their natural sugar content, it's essential to monitor portion sizes to stay within your daily carb limit.
What are the health benefits of purple onions?
Purple onions are rich in antioxidants, particularly anthocyanins, which may help reduce inflammation and support heart health. They also contain compounds like quercetin, which has been linked to improved immunity and reduced oxidative stress. Additionally, their fiber content promotes healthy digestion.
What is a recommended serving size for purple onions?
A common serving size for purple onions is about half a cup (58g) of chopped onion, which contains approximately 20 calories, 5g of carbohydrates, 0.5g of protein, and 0.3g of fiber. This portion size works well as part of salads, stir-fries, or as a garnish.
How do purple onions compare to white or yellow onions?
Purple onions tend to be slightly milder and sweeter compared to white onions and have more antioxidants due to their vibrant color. Nutritionally, they are similar in calories and macronutrients but offer more anthocyanins, which provide extra anti-inflammatory and heart-healthy benefits.
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.
- Flavonoid content in onions and their impact on human healthNational Library of Medicine (PubMed)A study highlighting the antioxidative and anti-inflammatory benefits of flavonoids found in onions.
- Onions and Cardiovascular Disease PreventionAmerican Journal of Clinical NutritionResearch analyzing onion consumption and its protective effects against cardiovascular diseases due to bioactive compounds.
- Dietary Guidelines for Americans, 2020-2025: VegetablesDietary Guidelines for AmericansGuidelines emphasizing the inclusion of allium vegetables, like onions, as part of a healthy dietary pattern.
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.
