CATALO's Natural Colostrum 30% IgG Formula provides 500mg of colostrum extract per capsule, standardized to contain up to 150mg of IgG. Sourced from healthy USA dairy cows within 24 hours after calving, this formula is processed using low-pressure, low-temperature methods to help preserve its natural bioactive compounds. It includes five key immunoglobulins—IgG, IgA, IgM, IgE, and IgD—and is commonly used to help support immune health and digestive balance.