11 Best Protein Powders, According to Years of Testing (2025)

Compare Top 11 Protein Powders

More Protein Powders to Consider

Photograph: Boutayna Chokrane

Naked Casein: With only one ingredient—micellar casein sourced from hormone-free skim milk—it’s about as clean as it gets. No added sugar, no artificial sweeteners, and no unnecessary additives. It’s cold-processed, to avoid any nastiness from chemicals or synthetic fillers, and it’s independently tested for both heavy metals and gluten. Each serving packs 26 grams of protein and 618 milligrams of calcium…