Coca-Cola formula version of Coca-Cola syrup contains kola nut extract; originally included for its caffeine content, modern Coca-Cola uses caffeine citrate produced by the decaffeination of coffee. The primary taste of Coca-Cola is thought to come from vanilla and cinnamon, with trace amounts of essential oils, and spices such as nutmeg. A 2015 study identified and measured 58 aroma compounds in common colas, confirming significant amounts of compounds corresponding to cinnamon, vanilla, nutmeg, orange and lemon essential oils in Coca Cola. During the 1980s, most U.S. Coca-Cola bottlers switched their primary sweetening ingredient from cane sugar (sucrose) to the cheaper high-fructose corn
Coca-Cola with Lime Ireland along with the Diet version; however, now only the Diet Coca-Cola with Lime variety remains on sale in that country. Coca-Cola Citra is available in Japan. Coca Cola with Lime was briefly available in Australia, but proved quite unpopular with some larger retailers such as Woolworths and Coles, who bought in bulk, having to reduce the price considerably (50c for a 1.25 L bottle compared to around A$2 for all other varieties) in order to clear the product out. Diet Coke with Lime was discontinued in the United Kingdom, as was Diet Coke with Lemon in the beginning of