Grass-fed whey protein powder

Grass-fed describes how the dairy cows that produced the milk for a whey protein were raised and fed, typically meaning a diet based on pasture grazing rather than grain feed for some or all of the animal's life. It is a sourcing claim about the raw milk, not a claim about the protein content, purity, or nutrition of the finished powder — a grass-fed product can still vary in protein per serving and added ingredients compared to another grass-fed product. Definitions and verification standards for grass-fed sourcing are not fully standardized across manufacturers, so check each product's packaging or company information for specifics if sourcing details matter to your decision. This page includes products carrying a grass-fed claim on their reviewed label; use the nutrition columns per 25 grams of protein to compare within the group.