Why is it Nasty?
The production and use of dyes have both environmental and human health consequences. Many dyes commonly found in goods sold in the U.S. are banned in other countries due to health concerns, and many that are currently in use are under review. Commercial dyes contain compounds such as benzidine that are known to be carcinogenic. In addition to their potential cancer-causing properties, dyes have been linked to mood disorders and hyperactivity. Dyes are almost never necessary for the function of a product and are simply added for aesthetic appeal.
How do I find it?
Most dyes are listed by their color name, such as “FD&C Blue” or “Yellow-5.”