PhD Micellar Casein+ Micellar Casein+ is a premium quality, slow release protein product derived from the finest micellar casein and fortified with ultra-slow acting, Micelle XL - the latest in casein protein technology. PhD Nutrition have combined the two best sources of casein to deliver the most modern, unique late night protein powder available. Micellar casein is widely recognised as the most superior form of casein protein and has long been used by serious athletes and body builders as the single most effective source of pre-bedtime protein. Micellar Casein is principally used as a pre-sleep protein drink due to its ability to release amino acids slowly into the muscles, thereby delivering its benefits over a sustained period of time. Containing high levels of branched chain amino acids and L-Glutamine, Micellar Casein+ provides over 4g of BCAA’s per 30g single serving and over 4g of the amino acid, L-Glutamine, a massively important amino acid for all athletes interested in building and repairing muscle.