F1 Nutrition % Pure ColostrumF1 Nutrition Colostrum is 100% natural, when a cow gives birth it produces colostrum instead of milk for the first 72 hours, its calf can double or triple its body weight in this time. Studies show that colostrum can increase your natural Growth Hormone and IGF 1 levels which have been shown to increase recovery, muscle growth, immunity and improve sleep and skin quality. Colostrum can also balance digestion and increase the absorption of other