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.
Coca-Cola Zero Sugar
In 2017, despite increasing sales in the United States, the Coca-Cola Company announced that Coca-Cola Zero would be reformulated and rebranded as Coca-Cola Zero Sugar, intended to taste more like standard Coca-Cola while emphasizing the lack of sugar content. The new formula was first tested in the United Kingdom in June 2016, with plans to roll it out in other countries in the following months.