Calcium Caseinate
Calcium Caseinate is synthesised from dried skimmed milk and it used mainly by bodybuilders for its slow releasing of amino acids (the building blocks of proteins). This essentially feeds your muscles throughout the night.
During the night you body can begin to become catabolic (breaking down muscle for fuel) as amino acids from Proteins are not readily available. This is were you should consider having a slow releasing protein before bed to provide a steady stream of amino acids during your sleep. Calcium Caseinate is perfect for this job hence its popularity in the health and fitness industry and in particular weight trainers and bodybuilders.