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Red Onion Calories

Naomi Sarah
Red onions are an important ingredient when roasting meats or making soup. It also contains a slew of nutrients, making it a healthy ground-vegetable choice.
Red onions, also known as 'purple onions', are a white and bulbous-shaped vegetable with a hint of purplish-red color on its inner and outer layers. These onions are sealed within a thin, paper-like skin which is discarded before being consumed. Red onions are a much-loved ground vegetable, especially in Indian-style cooking, where it is an essential ingredient. Red onions also go well with steak, salads, and sandwiches.

Types of Onions

Here's a multitude of different kinds of onions that are available for cooking, where each one has its own distinct and unique flavor.
  • Bermuda onions
  • Baby onions
  • Button onions
  • Brown onions
  • Boiling onions
  • Cocktail onions
  • Cipollini onions
  • Egyptian onions
  • Fresh onions (spring/summer onions)
  • Green onions
  • Leeks
  • Maui onions (Georgia Sweet Yellow Granex onions)
  • Purple onions (red)
  • Peal onions
  • Pickling onions
  • Scallions
  • Southport Red Globe onions
  • Shallots
  • Silverskin onions
  • Super sweet onions
  • Spanish onions
  • Storage onions (fall/winter onions)
  • Sweet onions
  • Tree onions
  • Top onions
  • Vidalia onions
  • Welsh onions
  • Wild onions
  • Walking onions
  • White onions
  • Walla Walla onions
  • Winter onions
  • Yellow onions

Nutritional Information

We now look into the nutritional values of this ground vegetable and how its caloric value fluctuates depending upon serving size and of course, the method of cooking involved.

Red Onion Nutritional Value

Nutrition Content - Sliced (1 cup serving = 48 calories)

Sodium - 3 mg
Sugars - 4.92 g
Total Fat - 0.09 g
Polyunsaturated Fat - 0.071 g
Saturated Fat - 0.03 g
Monounsaturated Fat - 0.026 g
Dietary Fiber - 1.6 g
Protein - 1.06 g
Calcium - 2%
Cholesterol - 0 mg
Iron - 1%
Carbohydrates - 11.63 g
Vitamin C - 11%
Serving Size - Caloric Content
10 rings - 25
Chopped, 1 cup - 67
1 small - 29
1 large - 63
100 g - 42

Method of Preparation - Caloric Content
Grilled (100 g) 37
Boiled (no salt, 128 g) 56
Fried (100 g) 164

Health Benefits

  • Chinese medicine highly incorporated the use of onions to treat coughs, asthma, bronchitis, and even colds.
  • Contains antimicrobial properties because of the substance 'thiosulfinates'.
  • Reduces the risk of stomach cancer.
  • Increases insulin receptor sensitivity, being rich in chromium.
  • They contain anti-bacterial properties to help fend off bacteria like salmonella, bacillus, and even E. coli.
  • Improves blood circulation.
  • Has antioxidant and anti-inflammatory properties.
  • Contains less fat and doesn't aid in weight gain.
  • Eases the symptoms of osteoporosis.
  • Relaxes muscles and also lowers blood pressure and cholesterol.
This vegetable can highlight a dish with its sweet, soft, and sometimes crunchy texture, as well as provides a good acidic base for meals. Feel free to add this in abundance to your dishes to take advantage of its many health benefits.