FOS is a carbonated functional beverage. The naturally sweetened, ready-to-drink BCAA supplement, with its combination of natural caffeine, 4000mg of BCAA (l-leucine, l-valine and l-isoleucine) in a 2:1:1 ratio, as well as the natural lemon lime flavouring not only makes this vegan drink exceptionally healthy, but easily palatable, as well. With added vitamins, The Focus Drink also supports energy production, cellular health, and immune support, courtesy of its supply of Niacin, Vitamin B1, Folic Acid, Biotin and Vitamin B12, along with Vitamin C. Manufactured in Austria, to the highest German and European quality standards, FOS is perfect not only as an exercise supplement, but is the preferred drink for everyone with an active healthy lifestyle.