Whey protein powder delivers a complete protein containing all nine essential amino acids needed to build muscle. Pete Nastasi, a certified nutrition coach, helped evaluate over 50 whey protein powders to identify top options.
Whey comes in three main forms. Whey protein concentrate, the least processed, contains 70 to 80 percent protein and higher levels of lactose and fat. Whey protein isolate contains 90 percent or more protein with less lactose after filtration. Hydrolysate is a third option, though details were not provided in the testing.
Transparent Labs Whey Protein Isolate delivers 28 grams of protein per serving. The grass-fed isolate undergoes filtration to remove excess sugar, fat, carbs, and lactose. Studies show dairy from grass-fed cows has a higher concentration of whey proteins and amino acids, which may support muscle training adaptations.
Sports Research Whey Protein contains 6.9 grams of branched-chain amino acids (BCAAs), including 1,000 milligrams of L-leucine. Studies show leucine may help reduce delayed onset muscle soreness.
Nutricost Whey Protein Concentrate is non-GMO, gluten-free, and third-party tested. Testers reported good mixability and taste comparable to Nesquik.
Legion Athletics whey isolate is certified by Labdoor, a third-party lab, to contain no banned substances. The protein is filtered to remove extra carbs and fat for bloat-free digestion.
Gainful Protein Powder comes in nine flavors in individual-use packets. Tasters noted subtle, not-too-sweet flavor profiles without the chalky aftertaste common in many protein powders.