Reviewed by Laura Martin on August 16, 2016
Environmental Working Group: "Brazilian-Style Blowouts: Still Poisonous, Still in Salons."; Occupational Safety and Health Administration: "Hair Smoothing Products That Could Release Formaldehyde."; FDA: "Hair-Smoothing Products That Release Formaldehyde When Heated."; National Institutes of Health: "New Substances Added to HHS Report on Carcinogens."; American Academy of Dermatology: "Dermatologists’ top tips for maintaining smooth, shiny hair."
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Some lotions that claim to be formaldehyde-free may have ingredients that also can pose risks. So if you're wondering what's in a certain product at your salon, just ask. The safe move is to skip those Brazilian style blowouts. You've got other ways to smooth your do. Change up your hair products, and talk to your stylist.
For WebMD, I'm Dr. Arefa Cassoobhoy.