Casein Sustain offers you a very high-quality micellar casein protein powder with an extremely slow & sustained amino acid release for effective anti-catabolic support over many hours. Casein Sustain is very effective for serious trainers due to its slow protein absorption which may combat muscle breakdown & support sustained growth & anabolism between meals & during sleep. Also ideal for stacking with other Maxiraw proteins including WPC Precision & WPI Intensity for a more sustained release of amino acids between meals & following training.