For a crash course on the hair-straightening treatment, we turned to hairstylists Jennifer Matos and Jennifer Lor. Keep reading for our expert-approved guide to getting a Brazilian blowout.

Central to these concerns is formaldehyde, a known carcinogen commonly found in hair straightening products ... about its presence in products like Brazilian Blowout and keratin treatments ...

The FDA has discouraged consumers from purchasing products containing formaldehyde or related ingredients due to potential health risks.