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Onion vs. Crab — In-Depth Nutrition Comparison

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Summary of differences between onions and crab

  • The amount of vitamin B12, copper, selenium, zinc, phosphorus, vitamin B5, vitamin B3, and choline in crab is higher than in onions.
  • Crab covers your daily need for vitamin B12, 139% more than onions.
  • The amount of sodium in onions is lower.
  • Crab has a lower glycemic index. The glycemic index of crab is 0, while the glycemic index of onions is 15.

These are the specific foods used in this comparison Onions, raw and Crustaceans, crab, blue, canned.

Infographic

Onion vs Crab 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.
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%
Crab
8
Magnesium Magnesium Calcium Calcium Potassium Potassium Iron Iron Copper Copper Zinc Zinc Phosphorus Phosphorus Sodium Sodium Manganese Manganese Selenium Selenium 26% 27% 23% 19% 271% 104% 100% 73% 9.7% 234%
Contains less SodiumSodium -99.3%
Contains more ManganeseManganese +74.3%
Contains more MagnesiumMagnesium +260%
Contains more CalciumCalcium +295.7%
Contains more PotassiumPotassium +77.4%
Contains more IronIron +138.1%
Contains more CopperCopper +1987.2%
Contains more ZincZinc +2141.2%
Contains more PhosphorusPhosphorus +706.9%
Contains more SeleniumSelenium +8480%

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
3
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%
Crab
9
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 11% 0.33% 37% 0% 5.8% 21% 52% 60% 36% 416% 0.75% 38% 44%
Contains more Vitamin CVitamin C +124.2%
Contains more Vitamin B1Vitamin B1 +100%
Contains more Vitamin KVitamin K +33.3%
Contains more Vitamin AVitamin A +∞%
Contains more Vitamin EVitamin E +9100%
Contains more Vitamin B2Vitamin B2 +244.4%
Contains more Vitamin B3Vitamin B3 +2268.1%
Contains more Vitamin B5Vitamin B5 +710.6%
Contains more Vitamin B6Vitamin B6 +30%
Contains more Vitamin B12Vitamin B12 +∞%
Contains more FolateFolate +168.4%
Contains more CholineCholine +1226.2%
~equal in Vitamin D ~0µg

All nutrients comparison - raw data values

Nutrient Onion Crab DV% diff.
Vitamin B12 0µg 3.33µg 139%
Copper 0.039mg 0.814mg 86%
Selenium 0.5µg 42.9µg 77%
Protein 1.1g 17.88g 34%
Zinc 0.17mg 3.81mg 33%
Cholesterol 0mg 97mg 32%
Phosphorus 29mg 234mg 29%
Sodium 4mg 563mg 24%
Vitamin B5 0.123mg 0.997mg 17%
Vitamin B3 0.116mg 2.747mg 16%
Choline 6.1mg 80.9mg 14%
Vitamin E 0.02mg 1.84mg 12%
Folate 19µg 51µg 8%
Calcium 23mg 91mg 7%
Fiber 1.7g 0g 7%
Magnesium 10mg 36mg 6%
Vitamin C 7.4mg 3.3mg 5%
Vitamin B2 0.027mg 0.093mg 5%
Iron 0.21mg 0.5mg 4%
Potassium 146mg 259mg 3%
Carbs 9.34g 0g 3%
Vitamin B6 0.12mg 0.156mg 3%
Polyunsaturated fat 0.017g 0.258g 2%
Fructose 1.29g 0g 2%
Calories 40kcal 83kcal 2%
Vitamin B1 0.046mg 0.023mg 2%
Manganese 0.129mg 0.074mg 2%
Fats 0.1g 0.74g 1%
Saturated fat 0.042g 0.201g 1%
Net carbs 7.64g 0g N/A
Sugar 4.24g 0g N/A
Vitamin A 0µg 1µg 0%
Vitamin K 0.4µg 0.3µg 0%
Trans fat 0g 0.014g N/A
Monounsaturated fat 0.013g 0.129g 0%
Tryptophan 0.014mg 0.226mg 0%
Threonine 0.021mg 0.727mg 0%
Isoleucine 0.014mg 0.776mg 0%
Leucine 0.025mg 1.307mg 0%
Lysine 0.039mg 1.386mg 0%
Methionine 0.002mg 0.452mg 0%
Phenylalanine 0.025mg 0.708mg 0%
Valine 0.021mg 0.806mg 0%
Histidine 0.014mg 0.393mg 0%
Omega-3 - EPA 0g 0.101g N/A
Omega-3 - DHA 0g 0.067g N/A
Omega-3 - DPA 0g 0.009g N/A
Omega-6 - Eicosadienoic acid 0g 0.005g N/A

Macronutrient Comparison

Macronutrient breakdown side-by-side comparison
Onion
2
9% 89%
Protein: 1.1 g
Fats: 0.1 g
Carbs: 9.34 g
Water: 89.11 g
Other: 0.35 g
Crab
3
18% 80% 2%
Protein: 17.88 g
Fats: 0.74 g
Carbs: 0 g
Water: 79.69 g
Other: 1.69 g
Contains more CarbsCarbs +∞%
Contains more WaterWater +11.8%
Contains more ProteinProtein +1525.5%
Contains more FatsFats +640%
Contains more OtherOther +382.9%

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
Crab
2
34% 22% 44%
Saturated fat: Sat. Fat 0.201 g
Monounsaturated fat: Mono. Fat 0.129 g
Polyunsaturated fat: Poly. Fat 0.258 g
Contains less Sat. FatSaturated fat -79.1%
Contains more Mono. FatMonounsaturated fat +892.3%
Contains more Poly. FatPolyunsaturated fat +1417.6%

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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. Crab - https://fdc.nal.usda.gov/fdc-app.html#/food-details/171966/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.