Micellar Casein is a protein powder that is slowly absorbed (up to 12 hours) and therefore supplies amino acids to the muscles over a long period of time. It is rich in naturally occurring branchedchain and essential amino acids (BCAAs and EAAs) and can assist in the maintenance and growth of muscle. Pure Product Micellar Casein is completely undenatured, sourced from NZ grassfed cows using ultrafiltration. It is naturally rich in Branch Chain Amino Acids (BCAAs) and Essential Amino Acids (EAAs). As a slowrelease, anticatabolic protein powder, Pure Product Micellar Casein is ideal consumed as a night protein (before bed), when your body typically goes for hours without food. Casein products are acid sensitive and thicken in the stomach. Compared to some other proteins, it can take longer for the Micellar Casein to be broken down into its amino acid subcomponents.