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Fennel vs. Grapefruit — In-Depth Nutrition Comparison

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How are fennel and grapefruit different?

  • Fennel is higher in vitamin K, potassium, iron, manganese, and fiber; however, grapefruit is richer in vitamin C.
  • Daily need coverage for vitamin K for fennel is 52% higher.
  • Fennel contains 9 times more iron than grapefruit. While fennel contains 0.73mg of iron, grapefruit contains only 0.08mg.
  • Fennel has less sugar.
  • Grapefruit has a lower glycemic index (25) than fennel (45).

Fennel, bulb, raw and Grapefruit, raw, pink and red, all areas are the varieties used in this article.

Infographic

Fennel vs Grapefruit 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.
Fennel
9
Magnesium Magnesium Calcium Calcium Potassium Potassium Iron Iron Copper Copper Zinc Zinc Phosphorus Phosphorus Sodium Sodium Manganese Manganese Selenium Selenium 12% 15% 37% 27% 22% 5.5% 21% 6.8% 25% 3.8%
Magnesium Magnesium Calcium Calcium Potassium Potassium Iron Iron Copper Copper Zinc Zinc Phosphorus Phosphorus Sodium Sodium Manganese Manganese Selenium Selenium 6.4% 6.6% 12% 3% 11% 1.9% 7.7% 0% 2.9% 0.55%
Contains more MagnesiumMagnesium +88.9%
Contains more CalciumCalcium +122.7%
Contains more PotassiumPotassium +206.7%
Contains more IronIron +812.5%
Contains more CopperCopper +106.3%
Contains more ZincZinc +185.7%
Contains more PhosphorusPhosphorus +177.8%
Contains more ManganeseManganese +768.2%
Contains more SeleniumSelenium +600%
Contains less SodiumSodium -100%

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.
Fennel
5
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 40% 16% 12% 0% 2.5% 7.4% 12% 14% 11% 0% 157% 20% 7.2%
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 104% 19% 2.6% 0% 11% 7.2% 3.8% 16% 12% 0% 0% 9.8% 4.2%
Contains more Vitamin EVitamin E +346.2%
Contains more Vitamin B3Vitamin B3 +213.7%
Contains more Vitamin KVitamin K +∞%
Contains more FolateFolate +107.7%
Contains more CholineCholine +71.4%
Contains more Vitamin CVitamin C +160%
Contains more Vitamin AVitamin A +20.8%
Contains more Vitamin B1Vitamin B1 +330%
Contains more Vitamin B5Vitamin B5 +12.9%
Contains more Vitamin B6Vitamin B6 +12.8%
~equal in Vitamin D ~0µg
~equal in Vitamin B2 ~0.031mg
~equal in Vitamin B12 ~0µg

Macronutrient Comparison

Macronutrient breakdown side-by-side comparison
Fennel
4
7% 90%
Protein: 1.24 g
Fats: 0.2 g
Carbs: 7.3 g
Water: 90.21 g
Other: 1.05 g
11% 88%
Protein: 0.77 g
Fats: 0.14 g
Carbs: 10.66 g
Water: 88.06 g
Other: 0.37 g
Contains more ProteinProtein +61%
Contains more FatsFats +42.9%
Contains more OtherOther +183.8%
Contains more CarbsCarbs +46%
~equal in Water ~88.06g

Fat Type Comparison

Fat type breakdown side-by-side comparison
Fennel
2
28% 21% 52%
Saturated fat: Sat. Fat 0.09 g
Monounsaturated fat: Mono. Fat 0.068 g
Polyunsaturated fat: Poly. Fat 0.169 g
27% 26% 47%
Saturated fat: Sat. Fat 0.021 g
Monounsaturated fat: Mono. Fat 0.02 g
Polyunsaturated fat: Poly. Fat 0.036 g
Contains more Mono. FatMonounsaturated fat +240%
Contains more Poly. FatPolyunsaturated fat +369.4%
Contains less Sat. FatSaturated fat -76.7%

Comparison summary table

Pay attention to the rightmost column. It displays the amounts side by side, giving a clearer understanding of the difference.
Fennel Grapefruit
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
Lower in Cholesterol Equal
Rich in vitamins Equal

All nutrients comparison - raw data values

Nutrient Fennel Grapefruit DV% diff.
Vitamin K 62.8µg 0µg 52%
Vitamin C 12mg 31.2mg 21%
Potassium 414mg 135mg 8%
Iron 0.73mg 0.08mg 8%
Manganese 0.191mg 0.022mg 7%
Fiber 3.1g 1.6g 6%
Phosphorus 50mg 18mg 5%
Folate 27µg 13µg 4%
Copper 0.066mg 0.032mg 4%
Vitamin B1 0.01mg 0.043mg 3%
Vitamin B3 0.64mg 0.204mg 3%
Calcium 49mg 22mg 3%
Vitamin E 0.58mg 0.13mg 3%
Sodium 52mg 0mg 2%
Fructose 1.77g 2%
Magnesium 17mg 9mg 2%
Zinc 0.2mg 0.07mg 1%
Vitamin B5 0.232mg 0.262mg 1%
Polyunsaturated fat 0.169g 0.036g 1%
Vitamin A 48µg 58µg 1%
Choline 13.2mg 7.7mg 1%
Calories 31kcal 42kcal 1%
Carbs 7.3g 10.66g 1%
Protein 1.24g 0.77g 1%
Selenium 0.7µg 0.1µg 1%
Fats 0.2g 0.14g 0%
Net carbs 4.2g 9.06g N/A
Sugar 3.93g 6.89g N/A
Vitamin B2 0.032mg 0.031mg 0%
Vitamin B6 0.047mg 0.053mg 0%
Saturated fat 0.09g 0.021g 0%
Monounsaturated fat 0.068g 0.02g 0%
Tryptophan 0.008mg 0%
Threonine 0.013mg 0%
Isoleucine 0.008mg 0%
Leucine 0.015mg 0%
Lysine 0.019mg 0%
Methionine 0.007mg 0%
Phenylalanine 0.013mg 0%
Valine 0.015mg 0%
Histidine 0.008mg 0%

Which food is preferable for your diet?

ok
ok
is better in case of low diet
Fennel Grapefruit
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
23%
Fennel
15%
Grapefruit
Minerals Daily Need Coverage Score
18%
Fennel
5%
Grapefruit

Comparison summary

Which food contains less Sodium?
Grapefruit
Grapefruit contains less Sodium (difference - 52mg)
Which food is lower in Saturated fat?
Grapefruit
Grapefruit is lower in Saturated fat (difference - 0.069g)
Which food is lower in glycemic index?
Grapefruit
Grapefruit is lower in glycemic index (difference - 20)
Which food is lower in Sugar?
Fennel
Fennel is lower in Sugar (difference - 2.96g)
Which food is cheaper?
Fennel
Fennel is cheaper (difference - $0.1)
Which food is richer in minerals?
Fennel
Fennel 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. Fennel - https://fdc.nal.usda.gov/fdc-app.html#/food-details/169385/nutrients
  2. Grapefruit - https://fdc.nal.usda.gov/fdc-app.html#/food-details/174673/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.