Accelerates metabolism. Burns body fat. Clinically proven. 7 essential vitamins. In 2005, vitamin industry entrepreneurs created Celsius. How does it work? Celsius’ proprietary MetaPlus formula, including green tea with EGCG, ginger and guarana seed, turns on thermogenesis, a process that boosts your body's metabolic rate. Drinking Celsius prior to fitness activities is proven to energize, accelerate metabolism, burn body fat and calories. Celsius provides essential energy to live fit.