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Soy protein isolate vs. Whey — In-Depth Nutrition Comparison

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What are the main differences between Soy protein isolate and Whey?

  • Whey has less Iron, Copper, Phosphorus, Manganese, Folate, Zinc, Choline, Calcium, and Vitamin B1 than Soy protein isolate.
  • Soy protein isolate's daily need coverage for Iron is 181% higher.
  • Soy protein isolate has 1493 times more Manganese than Whey. Soy protein isolate has 1.493mg of Manganese, while Whey has 0.001mg.
  • Whey contains less Sodium.

We used Soy protein isolate and Whey, sweet, fluid types in this comparison.

Infographic

Soy protein isolate vs Whey 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 28% 53% 7.1% 544% 533% 110% 333% 131% 195% 4.4%
Whey
3
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 +387.5%
Contains more CalciumCalcium +278.7%
Contains more IronIron +24066.7%
Contains more CopperCopper +39875%
Contains more ZincZinc +3000%
Contains more PhosphorusPhosphorus +1587%
Contains more ManganeseManganese +149200%
Contains more PotassiumPotassium +98.8%
Contains less SodiumSodium -94.6%
Contains more SeleniumSelenium +137.5%

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 0% 0% 0% 0% 44% 23% 27% 3.6% 23% 0% 0% 132% 104%
Whey
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 0.33% 0.72% 0% 0% 9% 36% 1.4% 23% 7.2% 35% 0% 0.75% 8.7%
Contains more Vitamin B1Vitamin B1 +388.9%
Contains more Vitamin B3Vitamin B3 +1843.2%
Contains more Vitamin B6Vitamin B6 +222.6%
Contains more FolateFolate +17500%
Contains more CholineCholine +1093.1%
Contains more Vitamin CVitamin C +∞%
Contains more Vitamin AVitamin A +∞%
Contains more Vitamin B2Vitamin B2 +58%
Contains more Vitamin B5Vitamin B5 +538.3%
Contains more Vitamin B12Vitamin B12 +∞%
~equal in Vitamin E ~0mg
~equal in Vitamin D ~µg
~equal in Vitamin K ~0µg

Macronutrient Comparison

Macronutrient breakdown side-by-side comparison
88% 3% 5% 3%
Protein: 88.32 g
Fats: 3.39 g
Carbs: 0 g
Water: 4.98 g
Other: 3.31 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 +10290.6%
Contains more FatsFats +841.7%
Contains more OtherOther +524.5%
Contains more CarbsCarbs +∞%
Contains more WaterWater +1769.9%

Fat Type Comparison

Fat type breakdown side-by-side comparison
16% 24% 61%
Saturated Fat: Sat. Fat 0.422 g
Monounsaturated Fat: Mono. Fat 0.645 g
Polyunsaturated fat: Poly. Fat 1.648 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 +545%
Contains more Poly. FatPolyunsaturated fat +14881.8%
Contains less Sat. FatSaturated Fat -45.5%

Comparison summary table

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

All nutrients comparison - raw data values

Nutrient Soy protein isolate Whey Opinion
Calories 335kcal 27kcal Soy protein isolate
Protein 88.32g 0.85g Soy protein isolate
Fats 3.39g 0.36g Soy protein isolate
Vitamin C 0mg 0.1mg Whey
Net carbs 0g 5.14g Whey
Carbs 0g 5.14g Whey
Cholesterol 0mg 2mg Soy protein isolate
Magnesium 39mg 8mg Soy protein isolate
Calcium 178mg 47mg Soy protein isolate
Potassium 81mg 161mg Whey
Iron 14.5mg 0.06mg Soy protein isolate
Sugar 0g 5.14g Soy protein isolate
Copper 1.599mg 0.004mg Soy protein isolate
Zinc 4.03mg 0.13mg Soy protein isolate
Phosphorus 776mg 46mg Soy protein isolate
Sodium 1005mg 54mg Whey
Vitamin A 0IU 12IU Whey
Vitamin A RAE 0µg 3µg Whey
Manganese 1.493mg 0.001mg Soy protein isolate
Selenium 0.8µg 1.9µg Whey
Vitamin B1 0.176mg 0.036mg Soy protein isolate
Vitamin B2 0.1mg 0.158mg Whey
Vitamin B3 1.438mg 0.074mg Soy protein isolate
Vitamin B5 0.06mg 0.383mg Whey
Vitamin B6 0.1mg 0.031mg Soy protein isolate
Vitamin B12 0µg 0.28µg Whey
Folate 176µg 1µg Soy protein isolate
Choline 190.9mg 16mg Soy protein isolate
Saturated Fat 0.422g 0.23g Whey
Monounsaturated Fat 0.645g 0.1g Soy protein isolate
Polyunsaturated fat 1.648g 0.011g Soy protein isolate
Tryptophan 1.116mg 0.013mg Soy protein isolate
Threonine 3.137mg 0.054mg Soy protein isolate
Isoleucine 4.253mg 0.047mg Soy protein isolate
Leucine 6.783mg 0.078mg Soy protein isolate
Lysine 5.327mg 0.068mg Soy protein isolate
Methionine 1.13mg 0.016mg Soy protein isolate
Phenylalanine 4.593mg 0.027mg Soy protein isolate
Valine 4.098mg 0.046mg Soy protein isolate
Histidine 2.303mg 0.016mg Soy protein isolate

Which food is preferable for your diet?

ok
ok
is better in case of low diet
Soy protein isolate Whey
Low Calories diet ok
Low Fats diet ok
Low Carbs diet ok
Low Glycemic Index diet ok

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%
Soy protein isolate
9%
Whey
Minerals Daily Need Coverage Score
194%
Soy protein isolate
8%
Whey

Comparison summary

Which food contains less Sodium?
Whey
Whey contains less Sodium (difference - 951mg)
Which food is lower in Saturated Fat?
Whey
Whey is lower in Saturated Fat (difference - 0.192g)
Which food is lower in Cholesterol?
Soy protein isolate
Soy protein isolate is lower in Cholesterol (difference - 2mg)
Which food is lower in Sugar?
Soy protein isolate
Soy protein isolate is lower in Sugar (difference - 5.14g)
Which food is lower in glycemic index?
Soy protein isolate
Soy protein isolate is lower in glycemic index (difference - 43)
Which food is cheaper?
Soy protein isolate
Soy protein isolate is cheaper (difference - $3.6)
Which food is richer in minerals?
Soy protein isolate
Soy protein isolate is relatively richer in minerals
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. Soy protein isolate - https://fdc.nal.usda.gov/fdc-app.html#/food-details/174276/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.