CELSIUS® is a Fitness Drink which is clinically proven to function. How? As a thermogenic, CELSIUS’ proprietary MetaPlus blend accelerates metabolism, increasing your body’s ability to burn fat and calories. There are only two ways a body burns fat: through increased heart rate and/or increased body temperature (thermogenesis). Drinking CELSIUS and then going into motion is double dipping, you’re accelerating the burn and the results are even faster.