THORNE Whey Protein Isolate, 21 g supplement bottle
THORNE

Whey Protein Isolate, 21 g

What We Researched
16 active ingredients analyzed · 6 inactive ingredients decoded · 1 retailer compared · Last updated: Mar 2026
72
Product Score Fair

Product Analysis

Transparency Very Good

Supplement Facts

IngredientAmount% DV
Calcium 94 mg 7%
Iron 1 mg 6%
Potassium 200 mg 4%
Whey Protein Isolate 25 g
Proprietary Blend 30 mg
Bromelain
Papain
Bioavailability Very Good

Absorption Rating

  • Calcium Good
  • Iron Fair
  • Potassium Good
  • Whey Protein Isolate Good
  • Proprietary Blend Fair
  • Bromelain Good
  • Papain Fair
Other Ingredients Excellent

Fillers & Additives

  • Alkalized Cocoa Powder
  • Flavors
  • Evaporated Cane Juice Sugar
  • Rebaudioside A
  • Xanthan Gum
  • Carboxymethylcellulose Gum
Efficacy Poor

Dosage Analysis

  • Calcium 94 mg Under-dosed
  • Iron 1 mg Under-dosed
  • Potassium 200 mg Under-dosed
  • Whey Protein Isolate 25 g Effective

Supplement Facts

Ingredient Amount % Daily Value
Calories 100
Total Fat 1 g 1%
Saturated Fat 0.5 g 3%
Cholesterol 10 mg 3%
Total Carbohydrate 4 g 1%
Dietary Fiber 1 g 4%
Total Sugars 2 g
Protein 21 g 42%
Calcium 94 mg 7%
Iron 1 mg 6%
Sodium 105 mg 5%
Potassium 200 mg 4%
Whey Protein Isolate 25 g
Proprietary Blend 30 mg
Bromelain
Papain

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Alkalized Cocoa Powder Safe

It is used to add a chocolate flavor and color to supplements.

Flavors Generally_safe

It is added to supplements to improve the taste.

Evaporated Cane Juice Sugar Unknown
Rebaudioside A Generally_safe

It is used to add sweetness to supplements without adding calories.

Xanthan Gum Safe

Thickens and stabilizes liquid and semi-solid supplements.

Carboxymethylcellulose Gum Unknown

Price Comparison

Prices shown at time of last check. Click a retailer to see current price. GoodSupp is not affiliated with any retailer.

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Frequently Asked Questions
Is THORNE Whey Protein Isolate, 21 g a good supplement?

THORNE Whey Protein Isolate, 21 g received a product quality score of 72/100 in GoodSupp's independent analysis, suggesting some areas that could be improved. The product contains 16 active ingredients with 30 servings per container. Of the 6 inactive ingredients, 2 are rated safe and 0 are flagged for review.

What are the ingredients in THORNE Whey Protein Isolate, 21 g?

THORNE Whey Protein Isolate, 21 g contains 16 active ingredients: Calories (100), Total Fat (1 g), Saturated Fat (0.5 g), Cholesterol (10 mg), Total Carbohydrate (4 g), Dietary Fiber (1 g), and 10 more. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is THORNE Whey Protein Isolate, 21 g safe to take?

THORNE Whey Protein Isolate, 21 g has been analyzed for ingredient safety across all its components. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

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Disclaimer: GoodSupp provides independent supplement quality analysis for informational purposes only. Scores are generated algorithmically based on ingredient profiles, brand certifications, and public records. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Product data is sourced from manufacturer labels and public databases. GoodSupp is not affiliated with any supplement brand.