Will dye damage my hair and turn it prematurely gray?

There's little study-based evidence of anyone getting gray hair from dyeing his or her hair over and over again. However, some studies have suggested that heavy use of hair dye might cause cancer [2] in some people (both in people who are dyeing their hair, and in colorists whose livelihood depends upon providing the coloring process). The connection to cancer needs more research, but it's enough of a possibility that scientists think it's a good idea to limit exposure to these products. The thinking is that more exposure over a lifetime will put one at a greater risk of potential problems. According to the U.S. Food and Drug Administration (FDA) [3], suspected cancer causing compounds are found in temporary, semipermanent, and permanent dyes.