Known Carcinogen Present in Soft Drinks Since 1990

Our soft drinks aren't as safe as we've been led to believe. Many contain dangerous levels of the known carcinogen benzene.


| June/July 2006


Many widely available soft drinks — including Hawaiian Punch, Diet Pepsi Twist, Sunny D, Kool-Aid Jammers and Country Time Lemonade — contain two ingredients that can form benzene, a known carcinogen linked to leukemia and other blood cancers; nervous and immune system disorders; anemia and chromosome aberrations. Benzene is particularly toxic to children and those who have repeated exposure.

The U.S. Food and Drug Administration (FDA) first learned of the hazard 16 years ago, when its researchers discovered that the interaction of benzoate preservatives and ascorbic acid (vitamin C) can form benzene. This interaction is exacerbated by prolonged storage under warm conditions, and the products most at risk are diet and sugar-free drinks.

Rather than advise a recall, the FDA entered into a private agreement with the largest beverage manufacturers, who agreed to “get the word out” to the rest of the industry. Some of the companies “fixed” the problem by adding sugar or chemicals called chelating agents, both of which can slow the formation of benzene.

But it seems many companies haven’t yet received word, since the two ingredients are still paired in a wide range of beverages all over the world. “There is no reason to add ascorbic acid to soft drinks,” says Glen Lawrence, a former science advisor for the FDA. “Those that have vitamin C naturally in them should not use sodium benzoate as a preservative. It is really very easy to avoid the problem.”

The FDA recently announced that it has again found benzene in some undisclosed beverages. Independent tests by other laboratories found benzene concentrations up to 10 times the federal limit for drinking water. (There is no allowable limit for beverages other than water, because the government assumes that people drink more water than anything else.)

The FDA maintains that the levels of benzene found recently are “not an imminent health hazard.” The Environmental Working Group (EWG), however, discovered that the FDA continued to test for benzene during the 1990s. Of the diet sodas tested, 79 percent contained levels above the federal limit for tap water.





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