About this item lean muscle growth: protein is the building block of muscle. best protein contains whey protein isolates, concentrates and hydrolysates that absorb quickly to help build and maintain lean muscle. high-quality protein: every scoop of best protein contains 24g of high-quality, laboratory-tested whey protein with no maltodextrin or fillers. naturally occurring bcaas: branched-chain amino acids (bcaas) are the building blocks of protein, and therefore, muscle. with 5.5g of naturally occurring bcaas per scoop, best protein supports lean muscle growth, muscle recovery and may prevent muscle soreness. superior taste: this delicious protein powder mixes easily, with no chalky aftertaste. enjoy a rich, smooth, creamy shake, no matter which flavor you choose. 100% money-back guarantee: bpi sports takes pride in making superior workout formulas that taste amazing! our products are proudly made right here in the usa, in a cgmp facility and backed with a 100% money-back guarantee.