madder root

Is Madder Dye Toxic? When taken by mouth: Madder is LIKELY UNSAFE. The chemicals in madder may cause cancer. Madder can also cause urine, saliva, perspiration, tears, and breast milk to turn red in color. Where is madder found? Madder, (genus Rubia), genus of about 80 species of perennial plants in the madder family (Rubiaceae),