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Asparagus vs. Onion — In-Depth Nutrition Comparison

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Summary of differences between Asparagus and Onion

  • The amount of Vitamin K, Iron, Copper, Vitamin B2, Folate, Vitamin B1, Vitamin E, and Vitamin B3 in Asparagus is higher than in Onion.
  • Asparagus covers your daily need of Vitamin K 34% more than Onion.
  • Asparagus contains 57 times more Vitamin E than Onion. While Asparagus contains 1.13mg of Vitamin E, Onion contains only 0.02mg.

These are the specific foods used in this comparison Asparagus, raw and Onions, raw.

Infographic

Asparagus 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.
Magnesium Magnesium Calcium Calcium Potassium Potassium Iron Iron Copper Copper Zinc Zinc Phosphorus Phosphorus Sodium Sodium Manganese Manganese Selenium Selenium 10% 7.2% 18% 80% 63% 15% 22% 0.26% 21% 13%
Onion
0
Magnesium Magnesium Calcium Calcium Potassium Potassium Iron Iron Copper Copper Zinc Zinc Phosphorus Phosphorus Sodium Sodium Manganese Manganese Selenium Selenium 7.1% 6.9% 13% 7.9% 13% 4.6% 12% 0.52% 17% 2.7%
Contains more MagnesiumMagnesium +40%
Contains more PotassiumPotassium +38.4%
Contains more IronIron +919%
Contains more CopperCopper +384.6%
Contains more ZincZinc +217.6%
Contains more PhosphorusPhosphorus +79.3%
Contains less SodiumSodium -50%
Contains more ManganeseManganese +22.5%
Contains more SeleniumSelenium +360%
~equal in Calcium ~23mg

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.
Vitamin C Vit. C Vitamin A Vit. A Vitamin E Vit. E Vitamin D Vit. D Vitamin B1 Vit. B1 Vitamin B2 Vit. B2 Vitamin B3 Vit. B3 Vitamin B5 Vit. B5 Vitamin B6 Vit. B6 Vitamin B12 Vit. B12 Vitamin K Vit. K Folate Folate Choline Choline 19% 45% 23% 0% 36% 33% 18% 16% 21% 0% 104% 39% 8.7%
Onion
2
Vitamin C Vit. C Vitamin A Vit. A Vitamin E Vit. E Vitamin D Vit. D Vitamin B1 Vit. B1 Vitamin B2 Vit. B2 Vitamin B3 Vit. B3 Vitamin B5 Vit. B5 Vitamin B6 Vit. B6 Vitamin B12 Vit. B12 Vitamin K Vit. K Folate Folate Choline Choline 25% 0.12% 0.4% 0% 12% 6.2% 2.2% 7.4% 28% 0% 1% 14% 3.3%
Contains more Vitamin AVitamin A +37700%
Contains more Vitamin EVitamin E +5550%
Contains more Vitamin B1Vitamin B1 +210.9%
Contains more Vitamin B2Vitamin B2 +422.2%
Contains more Vitamin B3Vitamin B3 +743.1%
Contains more Vitamin B5Vitamin B5 +122.8%
Contains more Vitamin KVitamin K +10300%
Contains more FolateFolate +173.7%
Contains more CholineCholine +162.3%
Contains more Vitamin CVitamin C +32.1%
Contains more Vitamin B6Vitamin B6 +31.9%
~equal in Vitamin D ~0µg
~equal in Vitamin B12 ~0µg

Macronutrient Comparison

Macronutrient breakdown side-by-side comparison
2% 4% 93%
Protein: 2.2 g
Fats: 0.12 g
Carbs: 3.88 g
Water: 93.22 g
Other: 0.58 g
Onion
1
9% 89%
Protein: 1.1 g
Fats: 0.1 g
Carbs: 9.34 g
Water: 89.11 g
Other: 0.35 g
Contains more ProteinProtein +100%
Contains more FatsFats +20%
Contains more OtherOther +65.7%
Contains more CarbsCarbs +140.7%
~equal in Water ~89.11g

Fat Type Comparison

Fat type breakdown side-by-side comparison
44% 56%
Saturated Fat: Sat. Fat 0.04 g
Monounsaturated Fat: Mono. Fat 0 g
Polyunsaturated fat: Poly. Fat 0.05 g
Onion
1
58% 18% 24%
Saturated Fat: Sat. Fat 0.042 g
Monounsaturated Fat: Mono. Fat 0.013 g
Polyunsaturated fat: Poly. Fat 0.017 g
Contains more Poly. FatPolyunsaturated fat +194.1%
Contains more Mono. FatMonounsaturated Fat +∞%
~equal in Saturated Fat ~0.042g

Carbohydrate type comparison

Carbohydrate type breakdown side-by-side comparison
12% 35% 53%
Starch: 0 g
Sucrose: 0.23 g
Glucose: 0.65 g
Fructose: 1 g
Lactose: 0 g
Maltose: 0 g
Galactose: 0 g
Onion
3
23% 46% 30%
Starch: 0 g
Sucrose: 0.99 g
Glucose: 1.97 g
Fructose: 1.29 g
Lactose: 0 g
Maltose: 0 g
Galactose: 0 g
Contains more SucroseSucrose +330.4%
Contains more GlucoseGlucose +203.1%
Contains more FructoseFructose +29%
~equal in Starch ~0g
~equal in Lactose ~0g
~equal in Maltose ~0g
~equal in Galactose ~0g

Comparison summary table

Pay attention to the rightmost column. It displays the amounts side by side, giving a clearer understanding of the difference.
Asparagus Onion
Lower in Glycemic Index ok
Lower in price ok
Lower in Sugar ok
Lower in Sodium 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 Asparagus Onion Opinion
Calories 20kcal 40kcal Onion
Protein 2.2g 1.1g Asparagus
Fats 0.12g 0.1g Asparagus
Vitamin C 5.6mg 7.4mg Onion
Net carbs 1.78g 7.64g Onion
Carbs 3.88g 9.34g Onion
Magnesium 14mg 10mg Asparagus
Calcium 24mg 23mg Asparagus
Potassium 202mg 146mg Asparagus
Iron 2.14mg 0.21mg Asparagus
Sugar 1.88g 4.24g Asparagus
Fiber 2.1g 1.7g Asparagus
Copper 0.189mg 0.039mg Asparagus
Zinc 0.54mg 0.17mg Asparagus
Phosphorus 52mg 29mg Asparagus
Sodium 2mg 4mg Asparagus
Vitamin A 756IU 2IU Asparagus
Vitamin A 38µg 0µg Asparagus
Vitamin E 1.13mg 0.02mg Asparagus
Manganese 0.158mg 0.129mg Asparagus
Selenium 2.3µg 0.5µg Asparagus
Vitamin B1 0.143mg 0.046mg Asparagus
Vitamin B2 0.141mg 0.027mg Asparagus
Vitamin B3 0.978mg 0.116mg Asparagus
Vitamin B5 0.274mg 0.123mg Asparagus
Vitamin B6 0.091mg 0.12mg Onion
Vitamin K 41.6µg 0.4µg Asparagus
Folate 52µg 19µg Asparagus
Choline 16mg 6.1mg Asparagus
Saturated Fat 0.04g 0.042g Asparagus
Monounsaturated Fat 0g 0.013g Onion
Polyunsaturated fat 0.05g 0.017g Asparagus
Tryptophan 0.027mg 0.014mg Asparagus
Threonine 0.084mg 0.021mg Asparagus
Isoleucine 0.075mg 0.014mg Asparagus
Leucine 0.128mg 0.025mg Asparagus
Lysine 0.104mg 0.039mg Asparagus
Methionine 0.031mg 0.002mg Asparagus
Phenylalanine 0.075mg 0.025mg Asparagus
Valine 0.115mg 0.021mg Asparagus
Histidine 0.049mg 0.014mg Asparagus
Fructose 1g 1.29g Onion

Which food is preferable for your diet?

ok
ok
is better in case of low diet
Asparagus Onion
Low Calories diet ok
Low Fats diet ok
Low Carbs 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
28%
Asparagus
8%
Onion
Minerals Daily Need Coverage Score
25%
Asparagus
8%
Onion

Comparison summary

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 - $3.8)
Which food is lower in Sugar?
Asparagus
Asparagus is lower in Sugar (difference - 2.36g)
Which food contains less Sodium?
Asparagus
Asparagus contains less Sodium (difference - 2mg)
Which food is lower in Saturated Fat?
Asparagus
Asparagus is lower in Saturated Fat (difference - 0.002g)
Which food is richer in minerals?
Asparagus
Asparagus is relatively richer in minerals
Which food is richer in vitamins?
Asparagus
Asparagus is relatively richer in vitamins
Which food contains less Cholesterol?
?
The foods are relatively equal in Cholesterol (0 mg)

References

All the values for which the sources are not specified explicitly are taken from FDA’s Food Central. The exact link to the food presented on this page can be found below.

  1. Asparagus - https://fdc.nal.usda.gov/fdc-app.html#/food-details/168389/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.