The world’s first protein-fortified sports drink still stands the test of time.

Designed to provide steady energy, buffer lactic acid, and prevent lean-muscle cannibalization, this 7:1 carb to protein blend has been a fan favorite since 1992. It is especially popular with ectomorphic, hyper-metabolic body types with limited fat stores who struggle to maintain muscle mass during high volume training. With a neutral, mild flavor and no sweeteners, Sustained Energy is perfect for those who like to keep it simple.