Chemicals in Your Soda: What They Are and What They Do (Slideshow)

Slide 1 of 8
4-Methylimidazole (4-MeI)

4-Mel is a chemical found in sodas that produces a caramel coloring. World Health Organization's International Agency for Research on Cancer along with the state of California, which now limits manufacturers to 29 micrograms of exposure for the average consumer per day, believes the chemical causes cancer. Large amounts of 4-Mel caused lung, liver, and thyroid cancer as well as leukemia in studies performed on rats. Sodas that contain 4-Mel include Malta Goya, Pepsi One, Diet Coke, Coke, and Coke Zero.