OstroVit - Histidine is an amino acid...
BioTech's Casein Zero contains only the slow-digesting protein, the calcium salt of the casein protein.
BioTech's Casein Zero Dietary Supplement is a lactose-free casein protein containing a high concentration of slow-absorbing protein.
Myprotein - Slow-Release Casein is a high quality source of micellar casein that is slowly digested with sustained release of amino acids.