Proper processing begins with freezing the colostrum as soon as possible to prevent bacterial growth. Otherwise the colostrum degrades rapidly, just as milk does. Synertek colostrum is flash pasteurized with a proprietary, FDA approved process developed through years of testing to provide safety while retaining product quality. Research indicates that pasteurization may actually benefit colostrum effectiveness in at least one way. (Calves fed heat-treated colostrum had significantly greater IgG concentrations and greater apparent efficiency of IgG absorption compared with calves fed unheated colostrum. – J Dairy Sci. 2009 Sep;92(9):4565-71) Synertek colostrum is spray-dried at low temperature. The lozenges are cold-pressed.