The Food and Drug Administration isn't happy with Diet Coke Plus. The agency sent a letter to Coke's CEO stating its nutrient claims violate federal law, reports Brandweek
. The soft drink was
launched in 2006 as "a good source of vitamins B3, B6 and B12, and the minerals zinc and magnesium," per company press materials. The FDA's letter says the drink is "misbranded" and fails to meet the
requirements for adding a "plus" claim. Coke will respond to the FDA in January.