Optimum Nutrition
High-quality protein blend with good amino acid profile, though contains artificial flavors and sweeteners that some may prefer to avoid.
Evaluated Feb 15, 2026
·AI-evaluatedTransparent Labs
Uses only grass-fed whey with no artificial colors, flavors, or sweeteners - just stevia leaf extract.
Garden of Life
USDA organic certified with grass-fed whey and no artificial additives or GMOs.
Kion
Grass-fed, cold-processed whey isolate with zero additives, artificial sweeteners, or fillers.
Clean whey protein sources with minimal fillers, but includes artificial additives
NSF certified for sport with batch testing for banned substances
Excellent whey isolate/concentrate blend with complete amino acid profile
Clear protein content labeling but proprietary enzyme blend quantities not disclosed