Recover overnight with Optimum Nutrition Naturally Flavored Gold Standard 100% Casein Drink Mix. This protein powder drink mix is slow to digest and absorb, which is perfect for helping your body refuel every night. Take this powder drink mix to help you recover while sleeping each night.
Recover overnight with Optimum Nutrition Naturally Flavored Gold Standard 100% Casein Drink Mix. This protein powder drink mix is slow to digest and absorb, which is perfect for helping your body refuel every night. Take this powder drink mix to help you recover while sleeping each night.