CELSIUS. Live Fit. A uniquely blended formula with healthy energy and key vitamins make CELSIUS an ideal pre-workout drink as well as a refreshing alternative to coffee and other caffeinated beverages. It?s low in sodium and contains zero sugar, no aspartame, and no artificial flavors, colors, or preservatives. CELSIUS energy drinks are also Certified Vegan, Kosher, and non-GMO. Its proprietary formula uses green tea extract with EGCG to boost your metabolism and help your body burn more calories. It also includes guarana seed extract, ginger root for flavor and digestion, vitamin C to support your immune system, vitamin B for energy production, and chromium to help control hunger.