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Red onion (very little) Calories
Very little red onion adds flavor and antioxidants.
CALORIES
GI
POTASSIUM
FIBER
Red onion (very little) Nutrition Facts
Selected: 100 g
40
KCAL / 100G
Carbs
9.3g
· 88%
Protein
1.1g
· 10%
Fat
0.1g
· 2%
Fiber
1.7g
Red onion (very little) 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
Red onion (very little) Glycemic Index
GLYCEMIC INDEX
GLYCEMIC LOAD
Accounts for portion size — a more realistic measure than GI alone.
Is Red onion (very little) Processed?
NOVA 1
Unprocessed
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 Red onion (very little) Contain Allergens?
No known major allergens
Which Diets Is Red onion (very little) 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
Red onion (very little) 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 Red onion (very little)
Red onion (very little) — Frequently Asked Questions
Is red onion better raw or cooked?
It depends on the dish: raw red onion is sharper and crisp, while cooking makes it milder and slightly sweeter. It works well raw in salads and sandwiches, and cooked in sautés, roasts, and sauces.
How can I make red onion taste less harsh?
Slice it thinly and soak it briefly in cold water to soften the bite. A little lemon juice or vinegar can also mellow the flavor and help keep the color bright.
How long does cut red onion keep in the fridge?
Once cut, red onion is best kept in a sealed container in the refrigerator and used within 1-2 days for best quality. Keeping it covered helps prevent drying out and spreading odor.
Can red onion be frozen?
Yes, chopped red onion can be frozen. After thawing it becomes softer, so it is usually better for cooked dishes than for raw salads.
What foods pair well with red onion?
Red onion pairs well with citrus, parsley, sumac, tomatoes, yogurt-based sauces, legumes, and grilled meats. Acidic and fresh flavors help balance its sharpness.
Is red onion a good choice before a workout?
A small amount is usually fine for many people, but raw onion can cause bloating, burping, or stomach discomfort in some. If you want it before training, keep the portion modest and test your tolerance.
Can eating red onion at night cause problems?
There is no special issue with eating it at night, but raw onion may worsen reflux or indigestion in sensitive people. If that happens, cooked onion is often easier to tolerate.
Is red onion better than white onion for salads?
Red onion is often preferred in salads because of its color and its pleasant bite when raw. White or yellow onion can work too, but the best choice depends on the flavor and texture you want.
Does red onion actually burn fat?
No single food directly burns fat on its own. Red onion is an unprocessed vegetable that can fit into a balanced diet, but it is not a shortcut for fat loss.
Who should be careful with red onion?
People with reflux, gastritis, IBS, or a sensitive stomach may find raw onion irritating. It can also cause stronger breath odor or digestive discomfort in some individuals.
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Nutrition data compiled from USDA FoodData Central and scientific sources.