The Scary Unknown Side Effects of Keratin Treatments


Mane Addicts.

Keratin treatments—aka the six-month-long blowout—are now a heavily debated topic. They were super popular at first because they actually worked. “People get keratin treatments to retain some of the curls and get rid of frizz,” says hairstylist Nunzio Saviano. But after finding out these treatments contain harmful chemicals, people have been wary of whether they were worth getting or not.

We asked both Saviano and Glamsquad Creative Director Giovanni Vaccaro for their input on the dangers of keratin treatments and whether or not we had to give them up for good. Luckily for those keratin-treatment loyalists, their answer was no. "I wouldn't say [keratin treatments] are necessarily bad for your hair," says Vaccaro. "There are different brands of keratin, and it's important to know what kind you're using and how frequently you're getting it done." We had them break it down in more detail for us.

Below, read about the negative effects keratin treatments can have on your hair and what you can do to avoid them.

They Are Linked to Cancer

Both Vaccaro and Saviano say keratin treatments that contain formaldehyde, the chemical that keeps hair frizz-free and straight for months at a time, are the treatments to be wary of. As defined by the Centers for Disease Control and Prevention, it is a colorless, strong-smelling gas that is usually used to make house building materials. In 1987, the U.S. Environmental Protection Agency classified it as a substance that could potentially cause cancer if exposed for a long period of time. Saviano suggests looking at reputable salons that offer formaldehyde keratin treatments at a safe percentage (anything below 0.002% is good) or salons that offer keratin treatments with formaldehyde alternatives.

There's a Risk of Allergic Reactions and Respiratory Problems

The CDC lists common side effects to formaldehyde exposure such as sore throat, nose bleeds, and scratchy eyes. In an interview with Glamour, Wynne Sisk, a hairstylist from Charleston, South Carolina, said she experienced heaviness in her chest and headaches that would last for several days when giving clients keratin treatments. In 2016, the Environmental Working Group and Women’s Voices for the Earth sued the Food and Drug Administration for failing to regulate the use of formaldehyde.

“For years stylists have reported that the application of these hair treatments caused difficulty breathing, eye irritation and nosebleeds,” said Tina Sigurdson, EWG assistant general counsel, in a press release about the lawsuit. “The FDA has been aware of the health hazards associated with the products since at least 2008.

There's a Risk of Hair Breakage And Increased Exposure To Formaldehyde

According to Saviano, you should pay attention to how much heat is applied to hair when getting a treatment. “If too much heat is applied or they over-straighten your hair, it will dry out your hair faster than normal and cause breakage,” says Saviano.

“The high temperature of the flatiron to seal the chemical into the hair is bad if you have existing damage to your strands,” says Vaccaro. “On top of that, when heat is applied to the hair, it releases formaldehyde into the air and those around end up inhaling it.”

Now that you have all the facts about keratin treatments, you can make smarter decisions when looking into getting one. Saviano says that if you go to well reputable places and do your homework on what ingredients salons use, you should be fine.

“Always consider the type and texture of your hair [and] your daily maintenance (other chemicals you are already using—color, single process, etc.),” says Vaccaro. “Make sure to communicate everything clearly with your stylist.”

As you weigh the pros and cons, here are a couple of hair-smoothing products that we’re currently loving.

Next up, check out these four products that will give you a blowout at home