The renowned Met-Rx protein formulation consists of a specific amino-acid array containing high concentrations of low molecular weight whey protein bio-active peptides - the highest quality component protein available. High gram amount of both free-form and peptide bonded glutamine helps prevent muscle tissue breakdown. Over 60% native casein proteins containing casomorphins, bio-active peptides that support protein digestion. High concentrations of lactoferrin for extra support during periods of stress associated with heavy training. 98% lactose free.