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Red Onions

Red Onions

EverydayFresh

Red onions are a bulb vegetable recognized by their vibrant purple-red skin and layered reddish flesh that retains color when raw. These onions contain anthocyanins – potent antioxidants responsible for their pigmentation – and offer a mild, slightly sweet flavor compared to sharper yellow or white varieties. Their crisp texture and visual appeal make them particularly popular for fresh applications like salads, sandwiches, and garnishes, though they caramelize effectively when cooked.

Macro Impact

A 1/2 cup serving contains 32 calories, 1g protein, 8g carbs, and 0g fat.

Calorie Burn

How long would it take to burn off 32 calories?
Walking3.5 mph, moderate pace
7 min
YogaModerate effort, gentle pace
5 min
SwimmingModerate effort, freestyle
4 min
Biking12-14 mph, moderate effort
3 min
StairsStair climbing, moderate pace
4 min
Running5 mph (12 min/mile)
3 min

Nutrition Facts

Serving size1/2 cup (80 g)
Amount per serving
Calories32
% Daily Value*
Total Fat0.1g
0%
Saturated Fat0g
0%
Trans Fat0g
Polyunsaturated Fat0g
Monounsaturated Fat0g
Cholesterol0mg
0%
Sodium2mg
0%
Total Carbohydrate8g
3%
Dietary Fiber2g
6%
Total Sugars5g
Includes Added Sugars0g
0%
Protein0.7g
Vitamin D0mcg
0%
Calcium14mg
1%
Iron0.2mg
1%
Potassium136mg
3%

* The % Daily Value (DV) tells you how much a nutrient in a serving contributes to a daily diet.

Nutrient Breakdown

Nutrient breakdown based on appropriate daily intake recommendations for a 175lb adult.

Carbs
Total Carbs
8 / 275 g
3%
Fiber
2 / 28 g
6%
Sugars
5 g
Added Sugars
0 / 50 g
0%
Soluble Fiber
0 g
Insoluble Fiber
0 g
Sugar Alcohols
0 g
Xylitol
0 g
Sorbitol
0 g
Other Carbohydrates
0 g
Fat
Total Fat
0 / 78 g
0%
Monounsaturated
0 / 31 g
0%
Polyunsaturated
0 / 23 g
0%
Saturated
0 / 23 g
0%
Trans
0 g
Cholesterol
0 / 300 g
0%
Omega 3
0 / 5 g
0%
Omega 6
0 / 19 g
0%
Omega 9
0 g
Protein
Protein
1 / 80 g
1%
Amino Acids
Histidine
0 / 3 g
0%
Isoleucine
0 / 2 g
0%
Leucine
0 / 3 g
0%
Lysine
0 / 2 g
0%
Methionine
0 / 1 g
0%
Phenylalanine
0 / 2 g
0%
Threonine
0 / 1 g
0%
Tryptophan
0 / 0 g
2%
Valine
0 / 2 g
0%
Arginine
0 g
Cysteine
0 g
Cystine
0 g
Tyrosine
0 g
Alanine
0 g
Aspartic Acid
0 g
Glutamic Acid
0 g
Glycine
0 g
Proline
0 g
Serine
0 g
Vitamins
Thiamine, B1
0 / 1 mg
2%
Riboflavin, B2
0 / 1 mg
2%
Niacin, B3
0 / 15 mg
0%
Pantothenic Acid, B5
0 / 5 mg
1%
Pyridoxine, B6
0 / 1 mg
2%
Biotin, B7
0 / 30 mcg
0%
Cobalamin, B12
0 / 2 mcg
0%
Folate
2 / 400 mcg
0%
Vitamin A
0 / 800 mcg
0%
Vitamin C
7 / 83 mg
8%
Vitamin D
0 / 15 mcg
0%
Vitamin E
0 / 15 mg
1%
Vitamin K
0 / 105 mcg
0%
Minerals
Calcium
14 / 1k mg
1%
Copper
0 / 1 mg
4%
Iron
0 / 13 mg
1%
Magnesium
9 / 370 mg
2%
Manganese
0 / 2 mg
4%
Phosphorous
32 / 700 mg
5%
Potassium
136 / 3k mg
5%
Selenium
0 / 55 mcg
1%
Sodium
2 / 2.3k mg
0%
Zinc
0 / 10 mg
1%
Chromium
0 / 30 mcg
0%
Molybdenum
2 / 45 mcg
3%
Iodine
0 / 150 mcg
0%
Chlorine
0 / 2.3k mg
0%
Other
Ethyl Alcohol
0 g
Water
72 g
Caffeine
0 mg
Choline
0 mg
Taurine
0 mg

References

Data on this page was sourced from a number of official governmental and non-governmental sources, including:

  1. 1.Onions, red, raw. USDA Foundational Foods. FDC ID 790577.
  2. 2.Onion, mature, red skinned, raw. Australian Nutrient Database. Public Food Key F009800.

Disclaimer & Important Notices

1. Informational Purposes Only: All nutritional information provided by OpenNutrition is for general informational purposes only. Our data is explicitly not intended to replace professional medical, nutritional, or dietary advice.

2. Accuracy & Reliability: We strive to ensure accuracy and quality using authoritative sources and AI-based validation; however, we make no guarantees regarding completeness, accuracy, or timeliness. Always confirm nutritional data independently when accuracy is critical.

3. Health Decisions: Never rely solely on OpenNutrition data when making health, medical, or dietary decisions. Always consult your healthcare provider or a registered dietitian for personalized health advice.

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