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Sweet potato vs. Onion — In-Depth Nutrition Comparison

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Significant differences between Sweet potato and Onion

  • The amount of Vitamin A, Manganese, Vitamin B5, Vitamin C, Copper, Vitamin B6, Potassium, Vitamin B3, Fiber, and Vitamin B2 in Sweet potato is higher than in Onion.
  • Sweet potato covers your daily Vitamin A needs 107% more than Onion.
  • Onion has 13 times less Vitamin B3 than Sweet potato. Sweet potato has 1.487mg of Vitamin B3, while Onion has 0.116mg.

Specific food types used in this comparison are Sweet potato, cooked, baked in skin, flesh, without salt and Onions, raw.

Infographic

Sweet potato 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 19% 11% 42% 26% 54% 8.7% 23% 4.7% 65% 1.1%
Onion
2
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 +170%
Contains more CalciumCalcium +65.2%
Contains more PotassiumPotassium +225.3%
Contains more IronIron +228.6%
Contains more CopperCopper +312.8%
Contains more ZincZinc +88.2%
Contains more PhosphorusPhosphorus +86.2%
Contains more ManganeseManganese +285.3%
Contains less SodiumSodium -88.9%
Contains more SeleniumSelenium +150%

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 65% 1153% 14% 0% 27% 24% 28% 53% 66% 0% 5.8% 4.5% 7.1%
Onion
1
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 CVitamin C +164.9%
Contains more Vitamin AVitamin A +960800%
Contains more Vitamin EVitamin E +3450%
Contains more Vitamin B1Vitamin B1 +132.6%
Contains more Vitamin B2Vitamin B2 +292.6%
Contains more Vitamin B3Vitamin B3 +1181.9%
Contains more Vitamin B5Vitamin B5 +618.7%
Contains more Vitamin B6Vitamin B6 +138.3%
Contains more Vitamin KVitamin K +475%
Contains more CholineCholine +114.8%
Contains more FolateFolate +216.7%
~equal in Vitamin D ~0µg
~equal in Vitamin B12 ~0µg

Macronutrient Comparison

Macronutrient breakdown side-by-side comparison
2% 21% 76%
Protein: 2.01 g
Fats: 0.15 g
Carbs: 20.71 g
Water: 75.78 g
Other: 1.35 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 +82.7%
Contains more FatsFats +50%
Contains more CarbsCarbs +121.7%
Contains more OtherOther +285.7%
Contains more WaterWater +17.6%

Fat Type Comparison

Fat type breakdown side-by-side comparison
36% 63%
Saturated Fat: Sat. Fat 0.052 g
Monounsaturated Fat: Mono. Fat 0.002 g
Polyunsaturated fat: Poly. Fat 0.092 g
Onion
2
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 +441.2%
Contains less Sat. FatSaturated Fat -19.2%
Contains more Mono. FatMonounsaturated Fat +550%

Carbohydrate type comparison

Carbohydrate type breakdown side-by-side comparison
52% 17% 4% 4% 23%
Starch: 7.05 g
Sucrose: 2.28 g
Glucose: 0.57 g
Fructose: 0.5 g
Lactose: 0 g
Maltose: 3.12 g
Galactose: 0 g
Onion
2
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 StarchStarch +∞%
Contains more SucroseSucrose +130.3%
Contains more MaltoseMaltose +∞%
Contains more GlucoseGlucose +245.6%
Contains more FructoseFructose +158%
~equal in Lactose ~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.
Sweet potato Onion
Rich in minerals ok
Rich in vitamins ok
Lower in Sugar ok
Lower in Sodium ok
Lower in Saturated Fat ok
Lower in Glycemic Index ok
Lower in Cholesterol Equal
Lower in price Equal

All nutrients comparison - raw data values

Nutrient Sweet potato Onion Opinion
Calories 90kcal 40kcal Sweet potato
Protein 2.01g 1.1g Sweet potato
Fats 0.15g 0.1g Sweet potato
Vitamin C 19.6mg 7.4mg Sweet potato
Net carbs 17.41g 7.64g Sweet potato
Carbs 20.71g 9.34g Sweet potato
Magnesium 27mg 10mg Sweet potato
Calcium 38mg 23mg Sweet potato
Potassium 475mg 146mg Sweet potato
Iron 0.69mg 0.21mg Sweet potato
Sugar 6.48g 4.24g Onion
Fiber 3.3g 1.7g Sweet potato
Copper 0.161mg 0.039mg Sweet potato
Zinc 0.32mg 0.17mg Sweet potato
Starch 7.05g 0g Sweet potato
Phosphorus 54mg 29mg Sweet potato
Sodium 36mg 4mg Onion
Vitamin A 19218IU 2IU Sweet potato
Vitamin A 961µg 0µg Sweet potato
Vitamin E 0.71mg 0.02mg Sweet potato
Manganese 0.497mg 0.129mg Sweet potato
Selenium 0.2µg 0.5µg Onion
Vitamin B1 0.107mg 0.046mg Sweet potato
Vitamin B2 0.106mg 0.027mg Sweet potato
Vitamin B3 1.487mg 0.116mg Sweet potato
Vitamin B5 0.884mg 0.123mg Sweet potato
Vitamin B6 0.286mg 0.12mg Sweet potato
Vitamin K 2.3µg 0.4µg Sweet potato
Folate 6µg 19µg Onion
Choline 13.1mg 6.1mg Sweet potato
Saturated Fat 0.052g 0.042g Onion
Monounsaturated Fat 0.002g 0.013g Onion
Polyunsaturated fat 0.092g 0.017g Sweet potato
Tryptophan 0.04mg 0.014mg Sweet potato
Threonine 0.107mg 0.021mg Sweet potato
Isoleucine 0.07mg 0.014mg Sweet potato
Leucine 0.118mg 0.025mg Sweet potato
Lysine 0.084mg 0.039mg Sweet potato
Methionine 0.037mg 0.002mg Sweet potato
Phenylalanine 0.114mg 0.025mg Sweet potato
Valine 0.11mg 0.021mg Sweet potato
Histidine 0.039mg 0.014mg Sweet potato
Fructose 0.5g 1.29g Onion

Which food is preferable for your diet?

ok
ok
is better in case of low diet
Sweet potato 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
111%
Sweet potato
8%
Onion
Minerals Daily Need Coverage Score
25%
Sweet potato
8%
Onion

Comparison summary

Which food is richer in minerals?
Sweet potato
Sweet potato is relatively richer in minerals
Which food is richer in vitamins?
Sweet potato
Sweet potato is relatively richer in vitamins
Which food is lower in Sugar?
Onion
Onion is lower in Sugar (difference - 2.24g)
Which food contains less Sodium?
Onion
Onion contains less Sodium (difference - 32mg)
Which food is lower in Saturated Fat?
Onion
Onion is lower in Saturated Fat (difference - 0.01g)
Which food is lower in glycemic index?
Onion
Onion is lower in glycemic index (difference - 55)
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. Sweet potato - https://fdc.nal.usda.gov/fdc-app.html#/food-details/168483/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.