CASEIN-FX™ is a thick and delicious protein containing pure Micellar Casein to provide 8 HOURS of protein delivery! You will notice that CASEIN-FX™ is thicker when you mix it up than other proteins. This helps you feel more full and helps to prevent you from late night snacking. CASEIN-FX™ provides a convenient, easy-to-mix and delicious way to keep your muscles fueled for hours.