Our take
Why It’s on Our Radar
We don't recommend it as a clean pick on ownership — it's owned by the public company Glanbia. Its flagship whey tested relatively well, but its Serious Mass gainer was flagged for arsenic. Here as a rated cautionary reference.
What's inside
Ingredients & Safety
Its Gold Standard whey tested among the safer products in Consumer Reports (Oct 2025), but its Serious Mass gainer showed inorganic arsenic at ~2× the safe daily limit — and the mass gainer is maltodextrin-based.
A couple to know — 1 ingredient we flag:
Maltodextrin — sometimes listed as Dextrin
A refined-starch filler with a glycemic index higher than table sugar that may also disrupt gut bacteria.
Full Ingredient List
- Maltodextrin also listed as Dextrin, Modified Food Starch Watch
- Whey Protein Blend
- Creatine
Prefer a spotless pick? Nordic Naturals in Supplements & Protein is Clean Verified — every ingredient clean, with no recalls or lawsuits on record.
Who owns it
Ownership & Independence
A wholly-owned subsidiary of Glanbia plc (public), acquired in 2008 (~$315M); not independent.
Where to buy
Key Products
- Gold Standard 100% Whey View on Amazon →
- Serious Mass (see alert) View on Amazon →
- Amino Energy View on Amazon →
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