Posts Tagged ‘allergic reaction’
Ingredient Watch List: Phenylenediamine, the Hair Dye Allergen That Can Irritate Skin
Wednesday, May 9th, 2012Have you had your hair colored lately? If so, you were probably exposed to phenylenediamine (PPD), a chemical widely used in most hair dyes, even those that claim to be natural. It’s a popular ingredient because it helps new color to look natural, and to withstand numerous washings without fading. There are some concerns with [...]
Ingredient Watch List: Formaldehyde, the Skin-Sensitizing Gas
Wednesday, February 29th, 2012Remember those old science experiments from seventh grade? Some of us really turned up our noses when the teacher came out with dead frogs in some sort of clear solution that smelled terrible. The source of that horrible smell was formaldehyde, a colorless gas mixed with water and methanol and used to preserve biological specimens. [...]
