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Onions, boiled in unsalted water: Calorie Count & Nutritional Breakdown

Onions, boiled in unsalted water contains 25 kcal per 100g, with 0.7g of protein, 5.4g of carbohydrates, and 0.3g of fat. Low in fat, with just 0.3g per 100g.

  • Key Micronutrients (per 100g): Iron 0.29mg, Calcium 25.0mg, Vitamin C 4.0mg
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Nutritional Overview

Onions, boiled in unsalted water is a beverage consumed for hydration, energy, or enjoyment. Per 100g serving, it provides 25 kcal of energy, 0.7g of protein, 5.4g of carbohydrates, and 0.3g of fat.

With just 0.3g of fat per 100g, it meets the UK/EU "low fat" nutrition-claim threshold. This makes it a lighter option for those monitoring their fat intake as part of a heart-healthy or weight-management diet.

Each 100g serving provides 2.3g of dietary fibre per 100g, meeting the UK/EU "high fibre" nutrition-claim threshold. The UK government recommends 30g of fibre per day for adults. Adequate fibre intake supports healthy digestion, helps regulate blood sugar levels, and may reduce the risk of heart disease and bowel cancer.

Each 100g serving contains 0.01g of salt, meeting the UK/EU "low salt" nutrition-claim threshold. The NHS recommends adults consume no more than 6g of salt per day, so choosing lower-salt foods like this one makes it easier to stay within that limit and supports healthy blood pressure. At 25 kcal per 100g, Onions, boiled in unsalted water is easy to log properly. Our food traffic light system calculator shows you exactly where it sits in your day.

Frequently Asked Questions

How many calories are in Onions, boiled in unsalted water?

Onions, boiled in unsalted water contains 25 kcal per 100g, which is approximately 1% of the recommended daily intake of 2,000 kcal for an average adult.

Is Onions, boiled in unsalted water a good source of protein?

Onions, boiled in unsalted water contains 0.7g of protein per 100g, which is relatively low. To increase your protein intake, consider pairing it with Applied Nutrition Blackcurrant Beef-XP, Marine collogen, Soy Protein Isolate, or other protein-rich foods.

Is Onions, boiled in unsalted water low in fat?

Yes, Onions, boiled in unsalted water contains only 0.3g of fat per 100g, meeting the UK/EU "low fat" nutrition-claim threshold. This makes it a suitable choice for those watching their fat intake.

Is Onions, boiled in unsalted water low in salt?

Yes, Onions, boiled in unsalted water contains only 0.01g of salt per 100g, meeting the UK/EU "low salt" nutrition-claim threshold. This makes it a suitable choice for those managing their sodium intake as part of a heart-healthy diet.

Is Onions, boiled in unsalted water high in fibre?

Yes, Onions, boiled in unsalted water provides 2.3g of dietary fibre per 100g, meeting the UK/EU "high fibre" nutrition-claim threshold. The UK government recommends 30g of fibre per day for adults.

Sources & References

Data source for this food

  1. UK Government (Public Health England / OHID), McCance and Widdowson's Composition of Foods Integrated Dataset (CoFID) 2021 — food composition database

General nutrition references

  1. British Nutrition Foundation — UK nutrition science and education
  2. USDA FoodData Central — US Department of Agriculture food composition database
  3. NHS Eat Well — UK National Health Service dietary guidance
  4. European Food Safety Authority (EFSA) — European dietary reference values and food safety science

Nutritional values are per 100g unless otherwise stated and are provided for general information only. Not a substitute for professional dietary or medical advice. If you have a health condition, allergy, or are pregnant, consult a qualified healthcare professional. Values may vary depending on brand, preparation method, and serving size.

Lower Calorie Alternatives

Real foods in the same category with meaningfully fewer calories than Onions, boiled in unsalted water (25 kcal per 100g). Tap one to compare them side by side.

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