Here are 12 chemicals that studies have shown to have serious health impacts:

1)      Antibacterials

2)      Coal tar colours:  FD&C Blue 1, Green 3

3)      Diethanolamine (DEA)

4)      1,4-Dioxane (present in sodium laureth sulfate and other –eth ingredients)

5)      Formaldehyde (from urea-based and quaternium preservatives)

6)      Fragrance

7)      Hydroquinone

8)      Mercury and lead

9)      Nanoparticles

10)  Parabens (methyl-, ethylpropyl-, butyl-, isobutyl-)

11)  Petroleum distillates

12)  Phenylenediamine (PPD)