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Tab is a sugar-free diet soda introduced by the Coca-Cola Company in 1963. It was the second diet soda ever marketed, after Royal Crown's Diet Rite soda, which was introduced in 1958. Originally containing cyclamate, Tab started using saccharin after the U.S. Food and Drug Administration banned cyclamate in 1969. Tab carried a warning label since saccharin was once thought to be hazardous itself, but ceased doing so when the FDA revoked mandatory warning labels in 2000. Saccharin was removed from the U.S. Environmental Protection Agency's list of hazardous substances in 2010.
Tab's popularity decreased with the introduction of Diet Coke in 1982, and it began using a small amount of aspartame blended with saccharin in 1984. Though Diet Coke is the top-selling diet soda, Tab still sold about 3 million cases in 2008.