Last reviewed May 2026
Is Optimum Nutrition Gold Standard Whey vegan?
Brand: ON Gold StandardManufacturer: GlanbiaSupplement / Protein
Not Vegan
Contains animal-derived ingredients.
In short
No — Contains milk-derived whey protein isolate.
01 · The verdict
The verdict
The world's best-selling whey protein.
02 · Reasoning
Why is it Not Vegan?
Contains milk-derived whey protein isolate. Not vegan.
03 · Regions
Regions & availability
Worldwide
04 · Alternatives
Vegan alternatives
Orgain Plant-Based Protein
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Frequently asked
FAQ
Is Optimum Nutrition Gold Standard vegan?
No, it is a dairy-based whey protein.
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