Our Immu-Start 50 Single Dose, first-care colostrum formula provides your calves with immediate immune support and intestinal protection from infection and disease. Plus, its been shown with continued use through the fourth week, our Immu-Start 50 product helps stimulate greater long-term milk production and faster growth of lean muscle mass as your animals grow to adulthood. Contains 50 Grams of IgG (immunoglobulins)per 400gram dose.