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Fish sandwich vs. Onion — In-Depth Nutrition Comparison

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What are the differences between fish sandwiches and onions?

  • Fish sandwiches are richer than onions in selenium, vitamin B12, iron, vitamin B1, vitamin B3, phosphorus, and vitamin K.
  • Fish sandwiches' daily need coverage for selenium is 32% more.
  • The amount of cholesterol in onions is lower.
  • The glycemic index of onions is lower.

We used Fast foods, fish sandwich, with tartar sauce and Onions, raw types in this article.

Infographic

Fish sandwich vs Onion infographic
Infographic link

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 18% 11% 18% 56% 25% 13% 50% 79% 34% 98%
Onion
1
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 +150%
Contains more CalciumCalcium +60.9%
Contains more PotassiumPotassium +41.1%
Contains more IronIron +614.3%
Contains more CopperCopper +92.3%
Contains more ZincZinc +188.2%
Contains more PhosphorusPhosphorus +300%
Contains more ManganeseManganese +104.7%
Contains more SeleniumSelenium +3500%
Contains less SodiumSodium -99.3%

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 6% 2% 11% 3% 53% 32% 40% 22% 16% 85% 34% 35% 16%
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% 0.4% 0% 12% 6.2% 2.2% 7.4% 28% 0% 1% 14% 3.3%
Contains more Vitamin AVitamin A +∞%
Contains more Vitamin EVitamin E +2650%
Contains more Vitamin DVitamin D +∞%
Contains more Vitamin B1Vitamin B1 +356.5%
Contains more Vitamin B2Vitamin B2 +418.5%
Contains more Vitamin B3Vitamin B3 +1753.4%
Contains more Vitamin B5Vitamin B5 +200.8%
Contains more Vitamin B12Vitamin B12 +∞%
Contains more Vitamin KVitamin K +3300%
Contains more FolateFolate +142.1%
Contains more CholineCholine +373.8%
Contains more Vitamin CVitamin C +311.1%
Contains more Vitamin B6Vitamin B6 +71.4%

Macronutrient Comparison

Macronutrient breakdown side-by-side comparison
10% 12% 27% 48% 2%
Protein: 10.29 g
Fats: 12.45 g
Carbs: 26.69 g
Water: 48.44 g
Other: 2.13 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 +835.5%
Contains more FatsFats +12350%
Contains more CarbsCarbs +185.8%
Contains more OtherOther +508.6%
Contains more WaterWater +84%

Fat Type Comparison

Fat type breakdown side-by-side comparison
18% 24% 58%
Saturated fat: Sat. Fat 1.949 g
Monounsaturated fat: Mono. Fat 2.595 g
Polyunsaturated fat: Poly. Fat 6.257 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 Mono. FatMonounsaturated fat +19861.5%
Contains more Poly. FatPolyunsaturated fat +36705.9%
Contains less Sat. FatSaturated fat -97.8%

Carbohydrate type comparison

Carbohydrate type breakdown side-by-side comparison
34% 42% 25%
Starch: 0 g
Sucrose: 0 g
Glucose: 1.2 g
Fructose: 1.47 g
Lactose: 0 g
Maltose: 0.87 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 FructoseFructose +14%
Contains more MaltoseMaltose +∞%
Contains more SucroseSucrose +∞%
Contains more GlucoseGlucose +64.2%
~equal in Starch ~0g
~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.
Fish sandwich Onion
Lower in Cholesterol ok
Lower in Sodium ok
Lower in Saturated fat ok
Lower in Glycemic Index ok
Lower in Sugar ok
Lower in price ok
Rich in minerals ok
Rich in vitamins ok

All nutrients comparison - raw data values

Nutrient Fish sandwich Onion DV% diff.
Polyunsaturated fat 6.257g 0.017g 42%
Selenium 18µg 0.5µg 32%
Vitamin B12 0.68µg 0µg 28%
Sodium 602mg 4mg 26%
Fats 12.45g 0.1g 19%
Protein 10.29g 1.1g 18%
Iron 1.5mg 0.21mg 16%
Vitamin B1 0.21mg 0.046mg 14%
Vitamin B3 2.15mg 0.116mg 13%
Cholesterol 35mg 0mg 12%
Phosphorus 116mg 29mg 12%
Calories 257kcal 40kcal 11%
Vitamin K 13.6µg 0.4µg 11%
Saturated fat 1.949g 0.042g 9%
Vitamin B2 0.14mg 0.027mg 9%
Folate 46µg 19µg 7%
Monounsaturated fat 2.595g 0.013g 6%
Carbs 26.69g 9.34g 6%
Vitamin C 1.8mg 7.4mg 6%
Manganese 0.264mg 0.129mg 6%
Vitamin B5 0.37mg 0.123mg 5%
Choline 28.9mg 6.1mg 4%
Vitamin B6 0.07mg 0.12mg 4%
Vitamin E 0.55mg 0.02mg 4%
Copper 0.075mg 0.039mg 4%
Magnesium 25mg 10mg 4%
Zinc 0.49mg 0.17mg 3%
Fiber 1g 1.7g 3%
Potassium 206mg 146mg 2%
Vitamin D 0.2µg 0µg 1%
Vitamin A 6µg 0µg 1%
Calcium 37mg 23mg 1%
Vitamin D 9IU 0IU 1%
Net carbs 25.69g 7.64g N/A
Sugar 3.53g 4.24g N/A
Trans fat 0.08g 0g N/A
Tryptophan 0.014mg 0%
Threonine 0.021mg 0%
Isoleucine 0.014mg 0%
Leucine 0.025mg 0%
Lysine 0.039mg 0%
Methionine 0.002mg 0%
Phenylalanine 0.025mg 0%
Valine 0.021mg 0%
Histidine 0.014mg 0%
Fructose 1.47g 1.29g 0%
Omega-3 - EPA 0.029g 0g N/A
Omega-3 - DHA 0.064g 0g N/A
Omega-3 - ALA 0.489g N/A
Omega-3 - DPA 0.003g 0g N/A
Omega-3 - Eicosatrienoic acid 0.001g N/A
Omega-6 - Gamma-linoleic acid 0.023g N/A
Omega-6 - Dihomo-gamma-linoleic acid 0.002g N/A
Omega-6 - Eicosadienoic acid 0.005g 0g N/A
Omega-6 - Linoleic acid 5.561g N/A

Which food is preferable for your diet?

ok
ok
is better in case of low diet
Fish sandwich 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
27%
Fish sandwich
8%
Onion
Minerals Daily Need Coverage Score
40%
Fish sandwich
8%
Onion

Comparison summary

Which food is lower in Cholesterol?
Onion
Onion is lower in Cholesterol (difference - 35mg)
Which food contains less Sodium?
Onion
Onion contains less Sodium (difference - 598mg)
Which food is lower in Saturated fat?
Onion
Onion is lower in Saturated fat (difference - 1.907g)
Which food is lower in glycemic index?
Onion
Onion is lower in glycemic index (difference - 41)
Which food is lower in Sugar?
Fish sandwich
Fish sandwich is lower in Sugar (difference - 0.71g)
Which food is cheaper?
Fish sandwich
Fish sandwich is cheaper (difference - $0.2)
Which food is richer in minerals?
Fish sandwich
Fish sandwich is relatively richer in minerals
Which food is richer in vitamins?
Fish sandwich
Fish sandwich is relatively richer in vitamins

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. Fish sandwich - https://fdc.nal.usda.gov/fdc-app.html#/food-details/170296/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.