What exactly is whey isolate?

Whey isolate is whey protein that's been extra filtered to remove fat and lactose. You end up with a powder that's 85-95% protein. Most brands use microfiltration or ion exchange.

How is it different from concentrate?

Concentrate has 70-80% protein with more fat, sugar and lactose. Isolate is cleaner but pricier. For muscle building, the difference is minimal if your total daily protein is on point.

Is isolate worth the extra cost?

Depends on your situation. If you're lactose sensitive or cutting hard, yes. For pure muscle building it doesn't matter much. Compare the price per gram of protein to see the real difference.

Who should use isolate?

People who are lactose sensitive, on a cut, or want minimal calories per shake. If you tolerate concentrate fine and aren't counting every calorie, it's not strictly necessary.

Home›Best whey›Best whey isolate 2026

Best whey isolate 2026

Whey isolate packs 85-95% protein with almost no fat or lactose. Costs more than concentrate, but you get more protein per scoop. These are sorted by price per gram of protein.

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Available in United States

9 products found

Best value

IsolateMuscleTech

MuscleTech Nitro-Tech

(4.4)

3 flavors

Performance whey with added creatine. Focused on strength and muscle growth.

~$64.95

1800g

Indicative price

Per gram protein$0.054

Protein per shake30g

Protein percentage67%

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Best value

MuscleTech·Whey ProteinIsolate

Nitro-Tech

~$64.951800gIndicative price

(4.4)

$0.054

Per gram protein

30g

Protein per shake

67%

Protein percentage

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IsolateAscent

Ascent 100% Whey Protein Powder

(4.8)

Whey isolate with 25g protein per 35g serving. The 1814g tub holds 52 servings and lists 1g sugar.

$89.99

1814g

Per gram protein$0.069

Protein per shake25g

Protein percentage71.43%

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Ascent·Whey ProteinIsolate

100% Whey Protein Powder

$89.991814g

(4.8)

$0.069

Per gram protein

25g

Protein per shake

71.43%

Protein percentage

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IsolateNutricost

Nutricost Whey Protein Isolate Powder

(4.7)

Whey isolate with 30g protein per 38g serving, 79% protein by weight. The 2268g pack covers 60 servings.

$124.95

2268g

Per gram protein$0.069

Protein per shake30g

Protein percentage78.95%

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Nutricost·Whey ProteinIsolate

Whey Protein Isolate Powder

$124.952268g

(4.7)

$0.069

Per gram protein

30g

Protein per shake

78.95%

Protein percentage

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IsolateFitRx

FitRx PoweRx Whey Protein Isolate Vanilla Bean High Protein Powder

(4.5)

Whey isolate with 26g protein per 30.8g serving, 84% protein by weight. The 153g pack covers 5 servings.

$10.97

153g

Per gram protein$0.084

Protein per shake26g

Protein percentage84.42%

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FitRx·Whey ProteinIsolate

PoweRx Whey Protein Isolate Vanilla Bean High Protein Powder

$10.97153g

(4.5)

$0.084

Per gram protein

26g

Protein per shake

84.42%

Protein percentage

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IsolateIsopure

Isopure Zero Carb 100% Whey Protein Isolate Powder

(4.5)

Whey isolate with 25g protein per 31g serving, 81% protein by weight. Zero carbs and 110 calories per serving.

$34.99

465g

Per gram protein$0.093

Protein per shake25g

Protein percentage80.65%

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Isopure·Whey ProteinIsolate

Zero Carb 100% Whey Protein Isolate Powder

$34.99465g

(4.5)

$0.093

Per gram protein

25g

Protein per shake

80.65%

Protein percentage

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IsolateLegion

Legion Athletics Whey+ Whey Protein Isolate Powder

(4.6)

Whey isolate at 81% protein by weight, 22g protein per 27.2g serving. The 816g tub holds 30 servings.

$64.99

816g

Per gram protein$0.098

Protein per shake22g

Protein percentage80.88%

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Legion·Whey ProteinIsolate

Athletics Whey+ Whey Protein Isolate Powder

$64.99816g

(4.6)

$0.098

Per gram protein

22g

Protein per shake

80.88%

Protein percentage

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IsolateIsopure

Isopure Zero Carb 100% Pure Whey Isolate Protein Powder

(4.5)

Whey isolate with 25g protein per 31g serving, zero carbs and zero sugar. The 434g tub covers 14 servings.

$34.97

434g

Per gram protein$0.100

Protein per shake25g

Protein percentage80.65%

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Isopure·Whey ProteinIsolate

Zero Carb 100% Pure Whey Isolate Protein Powder

$34.97434g

(4.5)

$0.100

Per gram protein

25g

Protein per shake

80.65%

Protein percentage

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IsolateOptimum Nutrition

Optimum Nutrition Gold Standard 100% Isolate

(4.8)

Ultra-pure whey isolate with 25g protein per serving. Fast-absorbing, low in fat and sugar.

~$81.75

930g

Indicative price

Per gram protein$0.105

Protein per shake25g

Protein percentage83.33%

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Optimum Nutrition·Whey ProteinIsolate

Gold Standard 100% Isolate

~$81.75930gIndicative price

(4.8)

$0.105

Per gram protein

25g

Protein per shake

83.33%

Protein percentage

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IsolateOptimum Nutrition

Optimum Nutrition Clear Whey Isolate

(4.4)

Refreshing clear whey isolate with fruity flavors. Light like lemonade, 20g protein per serving.

~$27.99

240g

Indicative price

Per gram protein$0.140

Protein per shake20g

Protein percentage83.33%

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Optimum Nutrition·Whey ProteinIsolate

Clear Whey Isolate

~$27.99240gIndicative price

(4.4)

$0.140

Per gram protein

20g

Protein per shake

83.33%

Protein percentage

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Frequently asked questions

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