Formulated using research proven ingredients, Extreme Burn ? safely works to Burn Calories, Curb Cravings and Increase Energy levels!*Includes Bioperine®, a proven bioavailability enhancing compound and our Patented 8 hour Sustained Release Technology - PhasedControl ?. Phased Control ? is a patented nutrient delivery technology that allows for greater absorption, bioavailability and controlled release of nutrients, providing calorie burning for up to 8 hours.