Cola by citric or other isolated acids. Coca-Cola's recipe is maintained as a corporate trade secret. A variety of different sweeteners may be added to cola, often partly dependent on local agricultural policy. High-fructose corn syrup (HFCS) is predominantly used in the United States and Canada due to the lower cost of government-subsidized corn. In Europe, however, HFCS is subject to production quotas designed to encourage the production of sugar; sugar is thus typically used to sweeten sodas. In addition, stevia or an artificial sweetener may be used; "sugar-free" or "diet" colas typically contain artificial sweeteners only. In the 1940s, Coca-Cola
Coca-Cola Julmust outsells Coca-Cola during the Christmas season. In Scotland, the locally produced Irn-Bru was more popular than Coca-Cola until 2005, when Coca-Cola and Diet Coke began to outpace its sales. In the former East Germany, Vita Cola, invented during Communist rule, is gaining popularity. In India, Coca-Cola ranked third behind the leader, Pepsi-Cola, and local drink Thums Up. The Coca-Cola Company purchased Thums Up in 1993. , Coca-Cola held a 60.9% market-share in India. Tropicola, a domestic drink, is served in Cuba instead of Coca-Cola, due to a United States embargo. French brand Mecca Cola and British brand Qibla Cola