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
Evoca Cola association with boxing and sports came about due to the tagline for the brand 'Evoca Cola - The Power Of Black Seed' alluding to the benefit of the added ingredient. In the UK Evoca Cola faced challenges from other brand competitors such as Virgin Cola but retained a presence in the market with a consistent client base due to its claims to hold a solid commitment to adhere to an 'exemplary level of quality, in its composition and taste' . Vendors of the cola have highlighted the presence of black seed, as black seed is well known in a number