Jamieson Progressive Grass Fed Whey Isolate Protein Powder, 35 g, Unflavoured, 850 g supplement bottle

Progressive Grass Fed Whey Isolate Protein Powder, 35 g, Unflavoured, 850 g Review

Q: Is Jamieson a trustworthy supplement brand?

Jamieson receives a brand trust score of 100/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1922 and headquartered in Toronto, Ontario, Canada, the company offers 384 products in their lineup. Note: Jamieson has 8 historical regulatory incidents on record, which are factored into the trust score.

What We Researched

1 active ingredient analyzed · 4 inactive ingredients decoded · 5 brand certifications checked · Page generated: Sep 2026

100

Product Score Excellent

100

Brand Score Excellent

Two independent scores — the product and the brand behind it, never blended into one number. See our methodology.

Product Analysis

Transparency Excellent

Supplement Facts

Ingredient	Amount	% DV
New Zealand whey protein isolate	35 g	—

Bioavailability Excellent

Absorption Rating

New Zealand whey protein isolate Good

Other Ingredients Excellent

Fillers & Additives

Chicory root inulin
Organic flaxseed
Guar Gum
Soy Lecithin

Efficacy Excellent

Dosage Analysis

New Zealand whey protein isolate 35 g Effective

Supplement Facts

Ingredient	Amount	% Daily Value
New Zealand whey protein isolate	35 g

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Chicory root inulin Unknown

Organic flaxseed Unknown

Guar Gum Safe

Thickens and provides fiber in supplement formulations.

Soy Lecithin Safe

Helps blend oil and water-based ingredients. Common allergen.

Brand Trust Report

Certifications

5 certifications

Consumerlab Source available Primary evidence

Health Canada Licensed Source available Primary evidence

Nsf Gmp Source available Primary evidence

Fda Gmp Inspections Source available Primary evidence

Informed Sport Source available Primary evidence

Transparency

4 claims

Third Party Testing Claim — Verified Evidence available Evidence

In House Testing — Verified Evidence available Evidence

Testing Lab Disclosure — Claimed Evidence available Evidence

Violation History

8 incidents

Prop 65 Lead2019-02-14 Source available Primary source

Lawsuit Products labeled as containing glucosamine sulfate did not actually contain any.2019 Source available Primary source

Lawsuit Manufacturing and selling products labeled as containing glucosamine sulfate which allegedly did not contain any glucosamine sulfate.2019 Source available Primary source

Recall Jamieson Vitamin B2 100 mg (NPN 00309702, Lots 1278153, 1387669, 1390088)2009-03-02 Source available Primary source

Recall Vitamin B22009-03-02 Source available Primary source

Recall Jamieson's MegaCal 650 mg with Vitamin D, 100 count (Lot 302273)2002-02-11 Source available Primary source

Recall MegaCal 650 mg with Vitamin D2002-02-11 Source available Primary source

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Frequently Asked Questions

Is Jamieson Progressive Grass Fed Whey Isolate Protein Powder, 35 g a good supplement?

Jamieson Progressive Grass Fed Whey Isolate Protein Powder, 35 g, Unflavoured, 850 g received a product quality score of 100/100 in GoodSupp's independent analysis, placing it in the top tier of supplements we've analyzed. The product contains 1 active ingredients Of the 4 inactive ingredients, 2 are rated safe and 0 ingredients are flagged for review. The manufacturer, Jamieson, holds a brand trust score of 100/100.

What are the ingredients in Jamieson Progressive Grass Fed Whey Isolate Protein Powder, 35 g?

Jamieson Progressive Grass Fed Whey Isolate Protein Powder, 35 g contains 1 active ingredients: New Zealand whey protein isolate (35 g). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Jamieson Progressive Grass Fed Whey Isolate Protein Powder, 35 g safe to take?

GoodSupp reviewed the inactive-ingredient data available for Jamieson Progressive Grass Fed Whey Isolate Protein Powder, 35 g, Unflavoured, 850 g. This label analysis cannot determine whether the product is safe for a particular person, and source labels may change. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is Jamieson a trustworthy supplement brand?

Jamieson receives a brand trust score of 100/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1922 and headquartered in Toronto, Ontario, Canada, the company offers 384 products in their lineup. Note: Jamieson has 8 historical regulatory incidents on record, which are factored into the trust score.

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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 — read our methodology. 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.