Edible parts
Vegetable flesh / as sold
Nutrition per 100 g
Food data (CoFID / USDA). Energy and macros show % RI; vitamins and minerals show % NRV (UK) where a reference exists. Curiosity about the plant — not a diary score.
Reference intake
Reference intake of an average adult (8 400 kJ / 2 000 kcal)
| Nutrient | Per 100 g | % RI |
|---|---|---|
| Energy | 167 kJ / 40 kcal | 2% |
| Protein | 1.1 g | 2% |
| Carbohydrate | 9.34 g | 4% |
| Natural sugars | 4.24 g | 5% |
| Fat | 0.1 g | <1% |
| Saturated fat | 0.04 g | <1% |
Fibre, fats & omega-3
| Nutrient | Per 100 g |
|---|---|
| Fibre | 1.7 g |
| Monounsaturated fat | 0.01 g |
| Polyunsaturated fat | 0.02 g |
Vitamins & minerals
| Nutrient | Per 100 g | % NRV (UK) |
|---|---|---|
| Vitamin C | 7.4 mg | 9% |
| Vitamin K | 0.4 µg | 1% |
| Folate | 19 µg | 10% |
| Thiamin (B1) | 0.05 mg | 4% |
| Riboflavin (B2) | 0.03 mg | 2% |
| Niacin (B3) | 0.12 mg | 1% |
| Pantothenic acid (B5) | 0.12 mg | 2% |
| Vitamin B6 | 0.12 mg | 9% |
| Choline | 6.1 mg | — |
| Calcium | 23 mg | 3% |
| Iron | 0.21 mg | 2% |
| Magnesium | 10 mg | 3% |
| Potassium | 146 mg | 7% |
| Zinc | 0.17 mg | 2% |
| Copper | 0.04 mg | 4% |
| Manganese | 0.13 mg | 6% |
| Phosphorus | 29 mg | 4% |
| Sodium | 4 mg | — |
µg is 1,000× smaller than mg — compare the % daily value, not the raw numbers. More
Vitamin D: plants have about none (the source rows say 0). UV-exposed mushrooms are the exception, and fortified packs vary, so check the pack.
Per 100 g · CoFID / USDA · % RI and % NRV UK · not medical advice
Figures: Onions, raw (USDA FDC SR Legacy 170000). Nutrients the row does not report are left blank.
Prep notes
The everyday cooking onion with brown skin. Same figures as a typical onion. One bulb is about 150 g.
Caution
Grocery / shop food data only. Not a wild forage guide. Thrive shows composition curiosity — not medical advice.
Answer-ready
Brown onion (Allium cepa) is listed in Thrive’s plant atlas under vegetable. Nutrition below is per 100 g with % NRV (UK) where a reference exists — food data for curiosity, not a diary score or medical claim. Edible part covered here: Vegetable flesh / as sold.