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Onion vs. Fiddlehead ferns — In-Depth Nutrition Comparison

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What are the differences between onions and fiddlehead ferns?

  • Fiddlehead ferns are richer than onions in copper, vitamin B3, vitamin C, vitamin A, manganese, vitamin B2, iron, phosphorus, potassium, and zinc.
  • Fiddlehead ferns' daily need coverage for copper is 31% more.

We used Onions, raw and Fiddlehead ferns, raw types in this article.

Infographic

Onion vs Fiddlehead ferns 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
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%
Magnesium Magnesium Calcium Calcium Potassium Potassium Iron Iron Copper Copper Zinc Zinc Phosphorus Phosphorus Sodium Sodium Manganese Manganese Selenium Selenium 24% 9.6% 33% 49% 107% 23% 43% 0.13% 67% 0%
Contains more SeleniumSelenium +∞%
Contains more MagnesiumMagnesium +240%
Contains more CalciumCalcium +39.1%
Contains more PotassiumPotassium +153.4%
Contains more IronIron +523.8%
Contains more CopperCopper +720.5%
Contains more ZincZinc +388.2%
Contains more PhosphorusPhosphorus +248.3%
Contains less SodiumSodium -75%
Contains more ManganeseManganese +295.3%

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.
Onion
7
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%
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 89% 60% 0% 0% 5% 48% 93% 0% 0% 0% 0% 0% 0%
Contains more Vitamin EVitamin E +∞%
Contains more Vitamin B1Vitamin B1 +130%
Contains more Vitamin B5Vitamin B5 +∞%
Contains more Vitamin B6Vitamin B6 +∞%
Contains more Vitamin KVitamin K +∞%
Contains more FolateFolate +∞%
Contains more CholineCholine +∞%
Contains more Vitamin CVitamin C +259.5%
Contains more Vitamin AVitamin A +∞%
Contains more Vitamin B2Vitamin B2 +677.8%
Contains more Vitamin B3Vitamin B3 +4193.1%
~equal in Vitamin D ~0µg
~equal in Vitamin B12 ~0µg

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
5% 6% 89%
Protein: 4.55 g
Fats: 0.4 g
Carbs: 5.54 g
Water: 88.68 g
Other: 0.83 g
Contains more CarbsCarbs +68.6%
Contains more ProteinProtein +313.6%
Contains more FatsFats +300%
Contains more OtherOther +137.1%
~equal in Water ~88.68g

Comparison summary table

Pay attention to the rightmost column. It displays the amounts side by side, giving a clearer understanding of the difference.
Onion Fiddlehead ferns
Lower in Sugar ok
Lower in Sodium ok
Lower in Saturated fat ok
Lower in Glycemic Index ok
Lower in price ok
Rich in minerals ok
Lower in Cholesterol Equal
Rich in vitamins Equal

All nutrients comparison - raw data values

Nutrient Onion Fiddlehead ferns DV% diff.
Copper 0.039mg 0.32mg 31%
Vitamin B3 0.116mg 4.98mg 30%
Vitamin C 7.4mg 26.6mg 21%
Vitamin A 0µg 181µg 20%
Manganese 0.129mg 0.51mg 17%
Vitamin B2 0.027mg 0.21mg 14%
Iron 0.21mg 1.31mg 14%
Phosphorus 29mg 101mg 10%
Vitamin B6 0.12mg 9%
Protein 1.1g 4.55g 7%
Potassium 146mg 370mg 7%
Fiber 1.7g 7%
Magnesium 10mg 34mg 6%
Zinc 0.17mg 0.83mg 6%
Folate 19µg 5%
Vitamin B5 0.123mg 2%
Fructose 1.29g 2%
Vitamin B1 0.046mg 0.02mg 2%
Choline 6.1mg 1%
Calcium 23mg 32mg 1%
Carbs 9.34g 5.54g 1%
Selenium 0.5µg 1%
Calories 40kcal 34kcal 0%
Fats 0.1g 0.4g 0%
Net carbs 7.64g 5.54g N/A
Sugar 4.24g N/A
Sodium 4mg 1mg 0%
Vitamin E 0.02mg 0%
Vitamin K 0.4µg 0%
Saturated fat 0.042g 0%
Monounsaturated fat 0.013g 0%
Polyunsaturated fat 0.017g 0%
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%

Which food is preferable for your diet?

ok
ok
is better in case of low diet
Onion Fiddlehead ferns
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
8%
Onion
23%
Fiddlehead ferns
Minerals Daily Need Coverage Score
8%
Onion
35%
Fiddlehead ferns

Comparison summary

Which food is lower in Sugar?
Fiddlehead ferns
Fiddlehead ferns is lower in Sugar (difference - 4.24g)
Which food contains less Sodium?
Fiddlehead ferns
Fiddlehead ferns contains less Sodium (difference - 3mg)
Which food is lower in Saturated fat?
Fiddlehead ferns
Fiddlehead ferns is lower in Saturated fat (difference - 0.042g)
Which food is lower in glycemic index?
Fiddlehead ferns
Fiddlehead ferns is lower in glycemic index (difference - 15)
Which food is cheaper?
Fiddlehead ferns
Fiddlehead ferns is cheaper (difference - $0.2)
Which food is richer in minerals?
Fiddlehead ferns
Fiddlehead ferns is relatively richer in minerals
Which food contains less Cholesterol?
?
The foods are relatively equal in Cholesterol (0 mg)
Which food is richer in vitamins?
?
It cannot be stated which food is richer in vitamins. See the charts below for detailed information. See the charts below for detailed information. See the charts below for detailed information.

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. Fiddlehead ferns - https://fdc.nal.usda.gov/fdc-app.html#/food-details/169405/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.