Colostrum is a special immune-active fluid secreted by a female cow for about three days after giving birth. Colostrum-IgG is made from 100% whole bovine colostrum that is not defatted and pesticide-free. Colostrum-IgG contains a minimum of 25% immunoglobulins (IgG) for effective immune support. In addition, this concentrate delivers a full-spectrum of multiple immune support agents including lactoferrin, N-acetylneurominic acid and IGF-I. Our colostrum is obtained from a very select group of dairy farmers dedicated to producing quality colostrum. During the summer, spring and fall, their cows are grass-fed (a superior nutrition source for cattle). During the winter, they are fed hay. We go the extra step with our colostrum powder by nitrogen flushing each bottle to maintain peak freshness.