Unwanted Side Effects of Brazilian Keratin Treatments

Last Updated on February 15, 2023 by Gaga

Keratin treatment has become very popular over the past decade due to its potential to dramatically improve the appearance of frizzy and unmanageable hair. A keratin straightening treatment is known for its ability to turn frizzy and curly strands into glossy and pin-straight hair. It makes hair more manageable and gives it a healthy and sleek look for up to four months. Keratin treatments are typically performed in a salon by a certified hair professional. However, a substantial number of at-home smoothing treatments have entered the market in recent years.

Is Keratin Treatment Bad for you?

To make hair straight, the formula– along with keratin – must contain chemicals that bind to the keratin in the hair. Many straightening systems use formaldehyde or its derivatives for straightening purposes. However, these chemical ingredients can cause both acute and long-term health problems. Your biggest concerns as a client are the short-term effects, which may include eye and skin irritation, and itching in the nose and throat.

A dark-skinned woman with black smooth hair

One of the main problems with keratin treatment products is that manufacturers don’t stick to the regulations that determine the concentrations of formaldehyde. The information on the label may not be completely accurate or may miss to include the correct hazard warnings. In such cases, even hair salon owners might don’t know that hair straightening products contain formaldehyde. Some of the formaldehyde-containing products may even be labeled as “formaldehyde-free”. An air test performed by Federal OSHA has shown high formaldehyde fumes levels in salons using Brazilian Blowout Acai Professional Smoothing Solution, which has been labeled as “formaldehyde-free”.

Dangers of being exposed to the chemicals during and after the straightening procedure include

  • Dizziness
  • Eye irritation
  • Skin irritations, particularly on the scalp
  • Ears and nose irritation
  • Coughing and difficulty in breathing
  • Hair loss
  • Allergic reaction

Allergic reactions can be in the form of itching, skin irritation, burning eyes, burning throat, and asthma attacks. Your dermatologist will give you advice on substances you should stay away from. Make sure to inform your stylist if you have any history of allergic reactions.

Many salons take special safety precautions during the procedure, such as proper ventilation and protective masks and gloves for their workers. However, continuous exposure to chemicals could pose health risks and cause long-term health problems for the stylists.

The Risks of Exposure to Formaldehyde

Formaldehyde is present in many products as a preservative, embalming agent, or disinfectant. Formaldehyde can also modify our hair proteins, causing the hair to return to its original, smooth state. Formaldehyde is classified as a suspected human carcinogen, according to the Environmental Protection Agency (EPA). It can cause acute and long-term health problems in sensitive persons, including breathing difficulties, nausea, and bloody noses. Formaldehyde levels above 0.1 ppm in the air can irritate the nose, throat, and lungs. If formaldehyde levels go up, the symptoms will get worse.

You can be exposed to formaldehyde by:

  • Breathing it in through your nose or mouth
  • Getting it on your skin
  • Getting it in your eyes or mouth
  • Being used on other customers in a saloon
black woman with long straightened hair

Is there a Formaldehyde-Free Keratin Treatment?

There are many formaldehyde-free formulations that are now available due to raised awareness of the problem. As public awareness grew, salons began offering “no-formaldehyde” and “low-formaldehyde” treatments. However, some hair-smoothing products listed as formaldehyde-free actually contain ingredients that break down into formaldehyde during the heat application stage. These formaldehyde-producing ingredients may be listed as formalin, formic aldehyde, methanol, methylene glycol, methylene oxide, paraform, oxomethane, and oxymethylene.

Other products that claim to be formaldehyde-free, were found, when tested by the US Occupational Safety and Health Administration (OSHA), to contain significant levels of formaldehyde. The low-formaldehyde products, while not as toxic as the original formulations, still carry health risks.

What are Alternatives to Keratin Straightening Treatment?

If you want smooth, frizz-free hair without possible side effects, there are some highly effective alternatives to formaldehyde-based straightening treatments.

To get quality, long-lasting straightening results you need to invest in high-quality flat iron. An effective straightener should go at least up to 400 degrees Fahrenheit. The high temperature helps smooth the cuticle and infuses hair with intense shine. Other features to look for are tourmaline and ionic technology. Ionic flat irons use negative ions to make hair shiny and frizz-free.

Other options to get straighter, shinier, and more manageable hair include Botox hair treatment and gentle amino acid-based smoothing treatments. Some of these mild smoothing treatments you can do yourself or with a little help from your more experienced friend.

The following is the list of keratin treatments that are known to contain formaldehyde or formaldehyde donors.

PRODUCTS LISTED IN HEALTH CANADA ADVISORIES WITH LEVEL OF FORMALDEHYDE (Source: d-scholarship.pitt.edu/19728/1/Frawley_MPH_essay_8_2013.doc)

Brazilian Blowout Smoothing Solution by Brazilian Blowout 8.4 %
Brazilian Keratin Treatment by Marcia Teixeira 1.8 %
Keratin Complex Smoothing Therapy Treatment by Copomon (Coppola) 1.8 %
Global Keratin Taming System Strawberry by Global Keratin 3.0 %
Global Keratin Taming System with Juvexin Strawberry Resistant by Global Keratin 4.4 %
Pro-Collagen RX Keratin Treatment 2.8 %
IStraight Keratin (Advanced Keratin Treatment) by IBS Beauty 2.3 %
Brazilian Thermal Reconstruction by Cadiveu 7.0 %

fashionable young woman with keratin-straightened hair

About the author

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Gaga is a blogger and founder of the Softer Hair website. She often says that insomnia is to blame for her first blogging attempts. Being the night owl, she hated the morning alarm. She left her office job and returned to what she loved most - writing.


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