Hair dye doesn't up cancer risk.
D000368:Aged; D001943:Breast Neoplasms / Q000139:chemically induced*; D005260:Female; D006202:Hair Dyes / Q000009:adverse effects*; D006801:Humans; D008297:Male; D008875:Middle Aged; D001749:Urinary Bladder Neoplasms / Q000139:chemically induced*
D006202:Hair Dyes