 The drink was released in the United Kingdom in October 2007, available in two variants, one with vitamins B3, B12, and vitamin C, and the other containing antioxidants with added green tea and vitamin C. Although Diet Coke Plus Antioxidants is labeled as sugar free, it actually contains 0.1 grams of sugar in the green tea powder per 100ml.On December 10, 2008, the United States Food and Drug Administration wrote a Warning Letter to The Coca-Cola Company that Diet Coke Plus violates the Federal Food, Drug, and Cosmetic Act.The term "plus" is a regulated term on food and beverages.