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Kefir vs. Whey — In-Depth Nutrition Comparison

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Summary of differences between Kefir and Whey

  • Whey has less Vitamin A, Phosphorus, and Calcium than Kefir.
  • Kefir covers your daily need of Vitamin A 19% more than Whey.
  • Kefir has 3 times more Calcium than Whey. While Kefir has 130mg of Calcium, Whey has only 47mg.

These are the specific foods used in this comparison Kefir, lowfat, plain, LIFEWAY and Whey, sweet, fluid.

Infographic

Kefir vs Whey 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.
Kefir
8
Magnesium Magnesium Calcium Calcium Potassium Potassium Iron Iron Copper Copper Zinc Zinc Phosphorus Phosphorus Sodium Sodium Manganese Manganese Selenium Selenium 8.6% 39% 14% 1.5% 3% 13% 45% 5.2% 0.65% 20%
Whey
1
Magnesium Magnesium Calcium Calcium Potassium Potassium Iron Iron Copper Copper Zinc Zinc Phosphorus Phosphorus Sodium Sodium Manganese Manganese Selenium Selenium 5.7% 14% 14% 2.3% 1.3% 3.5% 20% 7% 0.13% 10%
Contains more MagnesiumMagnesium +50%
Contains more CalciumCalcium +176.6%
Contains more CopperCopper +125%
Contains more ZincZinc +253.8%
Contains more PhosphorusPhosphorus +128.3%
Contains less SodiumSodium -25.9%
Contains more ManganeseManganese +400%
Contains more SeleniumSelenium +89.5%
Contains more IronIron +50%
~equal in Potassium ~161mg

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.
Kefir
8
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 0.67% 34% 0.4% 30% 7.5% 31% 2.8% 23% 13% 36% 0.25% 9.8% 8.3%
Whey
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 0.33% 0.72% 0% 0% 9% 36% 1.4% 23% 7.2% 35% 0% 0.75% 8.7%
Contains more Vitamin CVitamin C +100%
Contains more Vitamin AVitamin A +4641.7%
Contains more Vitamin EVitamin E +∞%
Contains more Vitamin DVitamin D +∞%
Contains more Vitamin B3Vitamin B3 +102.7%
Contains more Vitamin B6Vitamin B6 +87.1%
Contains more Vitamin KVitamin K +∞%
Contains more FolateFolate +1200%
Contains more Vitamin B1Vitamin B1 +20%
Contains more Vitamin B2Vitamin B2 +17%
~equal in Vitamin B5 ~0.383mg
~equal in Vitamin B12 ~0.28µg
~equal in Choline ~16mg

Macronutrient Comparison

Macronutrient breakdown side-by-side comparison
Kefir
3
4% 4% 90%
Protein: 3.79 g
Fats: 0.93 g
Carbs: 4.48 g
Water: 90.07 g
Other: 0.73 g
Whey
2
5% 93%
Protein: 0.85 g
Fats: 0.36 g
Carbs: 5.14 g
Water: 93.12 g
Other: 0.53 g
Contains more ProteinProtein +345.9%
Contains more FatsFats +158.3%
Contains more OtherOther +37.7%
Contains more CarbsCarbs +14.7%
~equal in Water ~93.12g

Fat Type Comparison

Fat type breakdown side-by-side comparison
Kefir
2
64% 30% 5%
Saturated Fat: Sat. Fat 0.658 g
Monounsaturated Fat: Mono. Fat 0.31 g
Polyunsaturated fat: Poly. Fat 0.053 g
Whey
1
67% 29% 3%
Saturated Fat: Sat. Fat 0.23 g
Monounsaturated Fat: Mono. Fat 0.1 g
Polyunsaturated fat: Poly. Fat 0.011 g
Contains more Mono. FatMonounsaturated Fat +210%
Contains more Poly. FatPolyunsaturated fat +381.8%
Contains less Sat. FatSaturated Fat -65%

Comparison summary table

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

All nutrients comparison - raw data values

Nutrient Kefir Whey Opinion
Calories 41kcal 27kcal Kefir
Protein 3.79g 0.85g Kefir
Fats 0.93g 0.36g Kefir
Vitamin C 0.2mg 0.1mg Kefir
Net carbs 4.48g 5.14g Whey
Carbs 4.48g 5.14g Whey
Cholesterol 5mg 2mg Whey
Vitamin D 41IU Kefir
Magnesium 12mg 8mg Kefir
Calcium 130mg 47mg Kefir
Potassium 164mg 161mg Kefir
Iron 0.04mg 0.06mg Whey
Sugar 4.61g 5.14g Kefir
Copper 0.009mg 0.004mg Kefir
Zinc 0.46mg 0.13mg Kefir
Phosphorus 105mg 46mg Kefir
Sodium 40mg 54mg Kefir
Vitamin A 569IU 12IU Kefir
Vitamin A 171µg 3µg Kefir
Vitamin E 0.02mg 0mg Kefir
Vitamin D 1µg Kefir
Manganese 0.005mg 0.001mg Kefir
Selenium 3.6µg 1.9µg Kefir
Vitamin B1 0.03mg 0.036mg Whey
Vitamin B2 0.135mg 0.158mg Whey
Vitamin B3 0.15mg 0.074mg Kefir
Vitamin B5 0.385mg 0.383mg Kefir
Vitamin B6 0.058mg 0.031mg Kefir
Vitamin B12 0.29µg 0.28µg Kefir
Vitamin K 0.1µg 0µg Kefir
Folate 13µg 1µg Kefir
Trans Fat 0.037g Whey
Choline 15.2mg 16mg Whey
Saturated Fat 0.658g 0.23g Whey
Monounsaturated Fat 0.31g 0.1g Kefir
Polyunsaturated fat 0.053g 0.011g Kefir
Tryptophan 0.013mg Whey
Threonine 0.054mg Whey
Isoleucine 0.047mg Whey
Leucine 0.078mg Whey
Lysine 0.068mg Whey
Methionine 0.016mg Whey
Phenylalanine 0.027mg Whey
Valine 0.046mg Whey
Histidine 0.016mg Whey
Omega-3 - ALA 0.006g Kefir
Omega-3 - DPA 0.001g 0g Kefir
Omega-6 - Dihomo-gamma-linoleic acid 0.002g Kefir
Omega-6 - Linoleic acid 0.029g Kefir

Which food is preferable for your diet?

ok
ok
is better in case of low diet
Kefir Whey
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
15%
Kefir
9%
Whey
Minerals Daily Need Coverage Score
15%
Kefir
8%
Whey

Comparison summary

Which food is lower in Cholesterol?
Whey
Whey is lower in Cholesterol (difference - 3mg)
Which food is lower in Saturated Fat?
Whey
Whey is lower in Saturated Fat (difference - 0.428g)
Which food is lower in Sugar?
Kefir
Kefir is lower in Sugar (difference - 0.53g)
Which food contains less Sodium?
Kefir
Kefir contains less Sodium (difference - 14mg)
Which food is lower in glycemic index?
Kefir
Kefir is lower in glycemic index (difference - 7)
Which food is cheaper?
Kefir
Kefir is cheaper (difference - $3.6)
Which food is richer in minerals?
Kefir
Kefir is relatively richer in minerals
Which food is richer in vitamins?
Kefir
Kefir 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. Kefir - https://fdc.nal.usda.gov/fdc-app.html#/food-details/170904/nutrients
  2. Whey - https://fdc.nal.usda.gov/fdc-app.html#/food-details/171282/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.