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Leek vs. Onion — In-Depth Nutrition Comparison

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How are Leek and Onion different?

  • Leek is higher than Onion in Vitamin K, Iron, Manganese, Folate, Vitamin A RAE, Copper, Vitamin B6, Vitamin E , and Vitamin C.
  • Leek covers your daily need of Vitamin K 39% more than Onion.

Leeks, (bulb and lower leaf-portion), raw and Onions, raw types were used in this article.

Infographic

Leek vs Onion infographic
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Mineral Comparison

Mineral comparison score is based on the number of minerals by which one or the other food is richer. The "coverage" charts below show how much of the daily needs can be covered by 300 grams of the food.
Leek
8
:
2
Onion
Contains more Calcium +156.5%
Contains more Iron +900%
Contains more Magnesium +180%
Contains more Phosphorus +20.7%
Contains more Potassium +23.3%
Contains more Copper +207.7%
Contains more Manganese +272.9%
Contains more Selenium +100%
Contains less Sodium -80%
Contains more Zinc +41.7%
Calcium Iron Magnesium Phosphorus Potassium Sodium Zinc Copper Manganese Selenium 18% 79% 20% 15% 16% 3% 4% 40% 63% 6%
Calcium Iron Magnesium Phosphorus Potassium Sodium Zinc Copper Manganese Selenium 7% 8% 8% 13% 13% 1% 5% 14% 17% 3%
Contains more Calcium +156.5%
Contains more Iron +900%
Contains more Magnesium +180%
Contains more Phosphorus +20.7%
Contains more Potassium +23.3%
Contains more Copper +207.7%
Contains more Manganese +272.9%
Contains more Selenium +100%
Contains less Sodium -80%
Contains more Zinc +41.7%

Vitamin Comparison

Vitamin comparison score is based on the number of vitamins by which one or the other food is richer. The "coverage" charts below show how much of the daily needs can be covered by 300 grams of the food.
Leek
10
:
0
Onion
Contains more Vitamin A +83250%
Contains more Vitamin E +4500%
Contains more Vitamin C +62.2%
Contains more Vitamin B1 +30.4%
Contains more Vitamin B2 +11.1%
Contains more Vitamin B3 +244.8%
Contains more Vitamin B5 +13.8%
Contains more Vitamin B6 +94.2%
Contains more Folate +236.8%
Contains more Vitamin K +11650%
Equal in Vitamin B2 - 0.027
Vitamin A Vitamin E Vitamin D Vitamin C Vitamin B1 Vitamin B2 Vitamin B3 Vitamin B5 Vitamin B6 Folate Vitamin B12 Vitamin K 101% 19% 0% 40% 15% 7% 8% 9% 54% 48% 0% 118%
Vitamin A Vitamin E Vitamin D Vitamin C Vitamin B1 Vitamin B2 Vitamin B3 Vitamin B5 Vitamin B6 Folate Vitamin B12 Vitamin K 1% 1% 0% 25% 12% 7% 3% 8% 28% 15% 0% 1%
Contains more Vitamin A +83250%
Contains more Vitamin E +4500%
Contains more Vitamin C +62.2%
Contains more Vitamin B1 +30.4%
Contains more Vitamin B2 +11.1%
Contains more Vitamin B3 +244.8%
Contains more Vitamin B5 +13.8%
Contains more Vitamin B6 +94.2%
Contains more Folate +236.8%
Contains more Vitamin K +11650%
Equal in Vitamin B2 - 0.027

Macronutrient Comparison

Macronutrient breakdown side-by-side comparison
Leek
4
:
1
Onion
Contains more Protein +36.4%
Contains more Fats +200%
Contains more Carbs +51.5%
Contains more Other +200%
Equal in Water - 89.11
14% 83%
Protein: 1.5 g
Fats: 0.3 g
Carbs: 14.15 g
Water: 83 g
Other: 1.05 g
9% 89%
Protein: 1.1 g
Fats: 0.1 g
Carbs: 9.34 g
Water: 89.11 g
Other: 0.35 g
Contains more Protein +36.4%
Contains more Fats +200%
Contains more Carbs +51.5%
Contains more Other +200%
Equal in Water - 89.11

Fat Type Comparison

Fat type breakdown side-by-side comparison
Leek
2
:
1
Onion
Contains more Polyunsaturated fat +876.5%
Contains more Monounsaturated Fat +225%
Equal in Saturated Fat - 0.042
19% 2% 79%
Saturated Fat: 0.04 g
Monounsaturated Fat: 0.004 g
Polyunsaturated fat: 0.166 g
58% 18% 24%
Saturated Fat: 0.042 g
Monounsaturated Fat: 0.013 g
Polyunsaturated fat: 0.017 g
Contains more Polyunsaturated fat +876.5%
Contains more Monounsaturated Fat +225%
Equal in Saturated Fat - 0.042

Comparison summary table

Pay attention to the rightmost column. It displays the amounts side by side, giving a clearer understanding of the difference.
Leek Onion
Lower in Sodium ok
Lower in Glycemic Index ok
Lower in price ok
Lower in Sugar ok
Lower in Saturated Fat ok
Rich in minerals ok
Rich in vitamins ok
Lower in Cholesterol Equal

All nutrients comparison - raw data values

Nutrient Leek Onion Opinion
Net carbs 12.35g 7.64g Leek
Protein 1.5g 1.1g Leek
Fats 0.3g 0.1g Leek
Carbs 14.15g 9.34g Leek
Calories 61kcal 40kcal Leek
Fructose 1.29g Onion
Sugar 3.9g 4.24g Leek
Fiber 1.8g 1.7g Leek
Calcium 59mg 23mg Leek
Iron 2.1mg 0.21mg Leek
Magnesium 28mg 10mg Leek
Phosphorus 35mg 29mg Leek
Potassium 180mg 146mg Leek
Sodium 20mg 4mg Onion
Zinc 0.12mg 0.17mg Onion
Copper 0.12mg 0.039mg Leek
Manganese 0.481mg 0.129mg Leek
Selenium 1µg 0.5µg Leek
Vitamin A 1667IU 2IU Leek
Vitamin A RAE 83µg 0µg Leek
Vitamin E 0.92mg 0.02mg Leek
Vitamin C 12mg 7.4mg Leek
Vitamin B1 0.06mg 0.046mg Leek
Vitamin B2 0.03mg 0.027mg Leek
Vitamin B3 0.4mg 0.116mg Leek
Vitamin B5 0.14mg 0.123mg Leek
Vitamin B6 0.233mg 0.12mg Leek
Folate 64µg 19µg Leek
Vitamin K 47µg 0.4µg Leek
Tryptophan 0.012mg 0.014mg Onion
Threonine 0.063mg 0.021mg Leek
Isoleucine 0.052mg 0.014mg Leek
Leucine 0.096mg 0.025mg Leek
Lysine 0.078mg 0.039mg Leek
Methionine 0.018mg 0.002mg Leek
Phenylalanine 0.055mg 0.025mg Leek
Valine 0.056mg 0.021mg Leek
Histidine 0.025mg 0.014mg Leek
Saturated Fat 0.04g 0.042g Leek
Monounsaturated Fat 0.004g 0.013g Onion
Polyunsaturated fat 0.166g 0.017g Leek

Which food is preferable for your diet?

ok
ok
is better in case of low diet
Leek Onion
Low Fats diet ok
Low Carbs diet ok
Low Calories diet ok
Low Glycemic Index diet ok

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Vitamins & Minerals Daily Need Coverage Score

The summary scores indicate the extent to which this food can fulfill your daily vitamin and mineral requirements if you consume 3 servings, consisting of 100 grams of each (an approximation of 3 serving sizes).
Vitamins Daily Need Coverage Score
35%
Leek
8%
Onion
Minerals Daily Need Coverage Score
26%
Leek
8%
Onion

Comparison summary

Which food contains less Sodium?
Onion
Onion contains less Sodium (difference - 16mg)
Which food is lower in glycemic index?
Onion
Onion is lower in glycemic index (difference - 17)
Which food is cheaper?
Onion
Onion is cheaper (difference - $0.2)
Which food is lower in Sugar?
Leek
Leek is lower in Sugar (difference - 0.34g)
Which food is lower in Saturated Fat?
Leek
Leek is lower in Saturated Fat (difference - 0.002g)
Which food is richer in minerals?
Leek
Leek is relatively richer in minerals
Which food is richer in vitamins?
Leek
Leek is relatively richer in vitamins
Which food contains less Cholesterol?
?
The foods are relatively equal in Cholesterol (0 mg)

References

The source of all the nutrient values on the page (excluding the main article the sources for which are presented separately if present) is the USDA's FoodCentral. The exact links to the foods presented on this page can be found below.

  1. Leek - https://fdc.nal.usda.gov/fdc-app.html#/food-details/169246/nutrients
  2. Onion - https://fdc.nal.usda.gov/fdc-app.html#/food-details/170000/nutrients

All the Daily Values are presented for males aged 31-50, for 2000-calorie diets.

Data provided by FoodStruct.com should be considered and used as information only. Please consult your physician before beginning any diet.