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Boiled Onion Calories
Low calorie, source of fiber, contains vitamin C
CALORIES
GI
POTASSIUM
FIBER
Boiled Onion Nutrition Facts
Selected: 100 g
40
KCAL / 100G
Carbs
9.2g
· 87%
Protein
1.1g
· 10%
Fat
0.1g
· 3%
Fiber
1.7g
Boiled Onion Vitamins & Minerals
Vitamins
Vitamin C
7.4mg · 8% DV
B6
0.12mg · 7% DV
Folate
19µg · 5% DV
B1
0.04mg · 3% DV
Minerals
Phosphorus
29mg · 4% DV
Potassium ⭐
146mg · 4% DV
Calcium
23mg · 2% DV
Magnesium
10mg · 2% DV
Boiled Onion Glycemic Index
GLYCEMIC INDEX
GLYCEMIC LOAD
Accounts for portion size — a more realistic measure than GI alone.
Is Boiled Onion Processed?
NOVA 2
Minimally Processed
1. Unprocessed
2. Minimally Processed
3. Processed
4. Ultra-Processed
NOVA classifies foods into 4 groups by industrial processing. NOVA 1 (unprocessed) is the healthiest.
Does Boiled Onion Contain Allergens?
No known major allergens
Which Diets Is Boiled Onion Good For?
Vegan
✓ Suitable
Vegetarian
✓ Suitable
Gluten-Free
✓ Suitable
Dairy-Free
— Not suitable
Mediterranean
✓ Suitable
Paleo
✓ Suitable
Whole30
— Not suitable
DASH
— Not suitable
Keto
— Not suitable
Low FODMAP
— Not suitable
Boiled Onion Fat Profile
SATURATED
0.02g
MONOUNSATURATED
0.01g
POLYUNSATURATED
0.03g
Omega 6:3 ratio 2:1
Below the ideal 4:1 — a good omega balance.
Foods Similar to Boiled Onion
Boiled Onion — Frequently Asked Questions
Why does boiled onion taste sweeter and milder than raw onion?
Boiling softens the onion’s structure and reduces many of the sharp sulfur compounds responsible for its pungency. The result is a gentler, slightly sweeter flavor and a soft texture.
How can I reduce the smell when boiling onions?
Keep the kitchen ventilated and avoid sealing the pot tightly, which can trap the odor. Cooking the onions only until tender also helps limit a strong smell.
When should I add boiled onion to soup?
Add it during the final 5 to 10 minutes, since it is already cooked and tender. Adding it too early can cause it to break down completely.
What foods pair well with boiled onion?
Boiled onion works especially well with lentils, beans, chickpeas, meat dishes, eggs, and potatoes. Its soft, mellow flavor adds moisture and depth without requiring much added fat.
Is boiled onion as healthy as raw onion?
Both can be part of a healthy diet, but cooking can reduce some heat-sensitive compounds found in raw onion. On the other hand, boiled onion may be easier to digest for people who find raw onion too harsh.
Can boiled onion cause bloating?
It can, because onions contain fermentable carbohydrates that may trigger gas or bloating in sensitive people. Boiling may make it easier for some people to tolerate, but those with IBS should start with a small amount.
How long does boiled onion last in the refrigerator?
Refrigerate it in a covered container within two hours of cooking. For best safety and quality, use it within 3 to 4 days.
Can boiled onion be frozen?
Yes. Cool it completely, freeze it in portions, and use it later in soups, sauces, or cooked dishes; it will be softer and wetter after thawing.
Is boiled onion a good food before exercise?
A large serving right before training may cause digestive discomfort in some people. If you tolerate onions well, a small amount as part of a balanced meal is usually a better choice than eating it alone immediately before exercise.
Does boiling onion destroy all of its nutrients?
No, boiling does not remove all nutrients, although some water-soluble vitamins can leach into the cooking water. Using that water in soup or a sauce can help retain those nutrients in the meal.
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Nutrition data compiled from USDA FoodData Central and scientific sources.