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 takes casein longer to be broken-down into its amino acid subcomponents than whey and other proteins. Because of this unique time-released quality, micellar casein is aptly described as anti-catabolic or muscle-protecting. Gold Standard 100% Casein is the only all-micellar formula on the market.