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Onion vs. Potato — In-Depth Nutrition Comparison

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What are the main differences between Onion and Potato?

  • Onion has less Vitamin B6, Potassium, Iron, Copper, Vitamin B3, Phosphorus, and Vitamin B5 than Potato.
  • Potato's daily need coverage for Vitamin B6 is 15% higher.
  • Onion has 4 times more Sugar than Potato. Onion has 4.24g of Sugar, while Potato has 1.18g.

We used Onions, raw and Potatoes, baked, flesh and skin, without salt types in this comparison.

Infographic

Onion vs Potato 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.
Onion
3
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%
Potato
7
Magnesium Magnesium Calcium Calcium Potassium Potassium Iron Iron Copper Copper Zinc Zinc Phosphorus Phosphorus Sodium Sodium Manganese Manganese Selenium Selenium 20% 4.5% 47% 41% 39% 9.8% 30% 1.3% 29% 2.2%
Contains more CalciumCalcium +53.3%
Contains less SodiumSodium -60%
Contains more SeleniumSelenium +25%
Contains more MagnesiumMagnesium +180%
Contains more PotassiumPotassium +266.4%
Contains more IronIron +414.3%
Contains more CopperCopper +202.6%
Contains more ZincZinc +111.8%
Contains more PhosphorusPhosphorus +141.4%
Contains more ManganeseManganese +69.8%

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.
Onion
0
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%
Potato
11
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 32% 0.6% 0.8% 0% 16% 11% 26% 23% 72% 0% 5% 21% 8.1%
Contains more Vitamin CVitamin C +29.7%
Contains more Vitamin AVitamin A +400%
Contains more Vitamin EVitamin E +100%
Contains more Vitamin B1Vitamin B1 +39.1%
Contains more Vitamin B2Vitamin B2 +77.8%
Contains more Vitamin B3Vitamin B3 +1115.5%
Contains more Vitamin B5Vitamin B5 +205.7%
Contains more Vitamin B6Vitamin B6 +159.2%
Contains more Vitamin KVitamin K +400%
Contains more FolateFolate +47.4%
Contains more CholineCholine +142.6%
~equal in Vitamin D ~0µg
~equal in Vitamin B12 ~0µg

Macronutrient Comparison

Macronutrient breakdown side-by-side comparison
Onion
1
9% 89%
Protein: 1.1 g
Fats: 0.1 g
Carbs: 9.34 g
Water: 89.11 g
Other: 0.35 g
Potato
4
3% 21% 75%
Protein: 2.5 g
Fats: 0.13 g
Carbs: 21.15 g
Water: 74.89 g
Other: 1.33 g
Contains more WaterWater +19%
Contains more ProteinProtein +127.3%
Contains more FatsFats +30%
Contains more CarbsCarbs +126.4%
Contains more OtherOther +280%

Fat Type Comparison

Fat type breakdown side-by-side comparison
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
Potato
2
36% 3% 61%
Saturated Fat: Sat. Fat 0.034 g
Monounsaturated Fat: Mono. Fat 0.003 g
Polyunsaturated fat: Poly. Fat 0.057 g
Contains more Mono. FatMonounsaturated Fat +333.3%
Contains less Sat. FatSaturated Fat -19%
Contains more Poly. FatPolyunsaturated fat +235.3%

Carbohydrate type comparison

Carbohydrate type breakdown side-by-side comparison
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
Potato
1
94% 2% 2% 2%
Starch: 17.27 g
Sucrose: 0.4 g
Glucose: 0.44 g
Fructose: 0.34 g
Lactose: 0 g
Maltose: 0 g
Galactose: 0 g
Contains more SucroseSucrose +147.5%
Contains more GlucoseGlucose +347.7%
Contains more FructoseFructose +279.4%
Contains more StarchStarch +∞%
~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.
Onion Potato
Lower in Sugar ok
Lower in Saturated Fat ok
Rich in minerals ok
Rich in vitamins ok
Lower in Sodium ok
Lower in Glycemic Index ok
Lower in Cholesterol Equal
Lower in price Equal

All nutrients comparison - raw data values

Nutrient Onion Potato Opinion
Calories 40kcal 93kcal Potato
Protein 1.1g 2.5g Potato
Fats 0.1g 0.13g Potato
Vitamin C 7.4mg 9.6mg Potato
Net carbs 7.64g 18.95g Potato
Carbs 9.34g 21.15g Potato
Magnesium 10mg 28mg Potato
Calcium 23mg 15mg Onion
Potassium 146mg 535mg Potato
Iron 0.21mg 1.08mg Potato
Sugar 4.24g 1.18g Potato
Fiber 1.7g 2.2g Potato
Copper 0.039mg 0.118mg Potato
Zinc 0.17mg 0.36mg Potato
Starch 0g 17.27g Potato
Phosphorus 29mg 70mg Potato
Sodium 4mg 10mg Onion
Vitamin A 2IU 10IU Potato
Vitamin A 0µg 1µg Potato
Vitamin E 0.02mg 0.04mg Potato
Manganese 0.129mg 0.219mg Potato
Selenium 0.5µg 0.4µg Onion
Vitamin B1 0.046mg 0.064mg Potato
Vitamin B2 0.027mg 0.048mg Potato
Vitamin B3 0.116mg 1.41mg Potato
Vitamin B5 0.123mg 0.376mg Potato
Vitamin B6 0.12mg 0.311mg Potato
Vitamin K 0.4µg 2µg Potato
Folate 19µg 28µg Potato
Choline 6.1mg 14.8mg Potato
Saturated Fat 0.042g 0.034g Potato
Monounsaturated Fat 0.013g 0.003g Onion
Polyunsaturated fat 0.017g 0.057g Potato
Tryptophan 0.014mg 0.025mg Potato
Threonine 0.021mg 0.081mg Potato
Isoleucine 0.014mg 0.08mg Potato
Leucine 0.025mg 0.119mg Potato
Lysine 0.039mg 0.13mg Potato
Methionine 0.002mg 0.038mg Potato
Phenylalanine 0.025mg 0.099mg Potato
Valine 0.021mg 0.125mg Potato
Histidine 0.014mg 0.042mg Potato
Fructose 1.29g 0.34g Onion

Which food is preferable for your diet?

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

People also compare

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
8%
Onion
17%
Potato
Minerals Daily Need Coverage Score
8%
Onion
22%
Potato

Comparison summary

Which food is lower in Sugar?
Potato
Potato is lower in Sugar (difference - 3.06g)
Which food is lower in Saturated Fat?
Potato
Potato is lower in Saturated Fat (difference - 0.008g)
Which food is richer in minerals?
Potato
Potato is relatively richer in minerals
Which food is richer in vitamins?
Potato
Potato is relatively richer in vitamins
Which food contains less Sodium?
Onion
Onion contains less Sodium (difference - 6mg)
Which food is lower in glycemic index?
Onion
Onion is lower in glycemic index (difference - 71)
Which food contains less Cholesterol?
?
The foods are relatively equal in Cholesterol (0 mg)
Which food is cheaper?
?
The foods are relatively equal in price ($0.2)

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. Onion - https://fdc.nal.usda.gov/fdc-app.html#/food-details/170000/nutrients
  2. Potato - https://fdc.nal.usda.gov/fdc-app.html#/food-details/170093/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.