What it is: This product truly is the Gold Standard of Casein blends. Gold Standard 100% Casein by Optimum Nutrition. Elite Supps believes that sometimes slower is better - especially when it comes to the rate of protein digestion. While rapid protein absorption is desirable immediately before or after exercise, delayed release is probably more beneficial throughout the remainder of the day. Casein proteins are pH sensitive and gel in the acidic environment of the stomach. As a result, it can take more than twice as long for caseins to be broken-down into their amino acid subcomponents than whey and other proteins. Because of their unique time-released qualities, caseins are aptly described as anti-catabolic or muscle-protecting protein. Slow Releasing/Digesting Protein Stay Fuller for Longer Recover Consistently Perfect Meal Replacement Directions: Take 1 serve with 300mls water as a snack during the day or before bed.