Diet Coke
Diet Coke does not use a modified form of the Coca-Cola recipe, but instead an entirely different formula. The controversial New Coke, introduced in 1985, used a version of the Diet Coke recipe that contained high fructose corn syrup and had a slightly different balance of ingredients. In 2004, Coca-Cola introduced Coca-Cola C2, which it claims tastes much closer to Coca-Cola but contains half the carbohydrates. In 2005, the company introduced Coca-Cola Zero (replaced by "Coca-Cola Zero Sugar" in 2017), a sugar-free variation of regular Coca-Cola.
Mexican Coke
Although intended for consumption in Mexico, Mexican Coca-Cola has become popular in the United States because of a flavor that Coca-Cola fans call more "natural tasting". While many believe the primary difference in flavor between Mexican Coca-Cola and the American Coca-Cola formula is that Mexican Coke is sweetened using cane sugar as opposed to high-fructose corn syrup, a scientific analysis of Mexican Coke found no sucrose (standard sugar), but instead found fructose and glucose levels similar to other soft drinks sweetened with high-fructose corn syrup. Most of the Mexican Coke exported to the United States is made with cane sugar, while some Mexican bottlers may use high-fructose corn syrup for drinks intended for sale in Mexico. Therefore, while most of the Coca-Cola labeled "Mexican" in the United States is made with cane sugar, this is not true of all Coca-Cola sold in Mexico.