Keratin Treatment For Hair- Benefits, Side Effects, Science and More.

Frizzy and difficult-to-manage hair can make everyday styling time-consuming. A keratin treatment changes the way the hair looks and feels by smoothing the hair surface and reducing frizz.

The result can make hair easier to manage, but the cosmetic improvement does not mean the hair has become healthier. The condition of your hair before treatment, the formula used, and how often you repeat the treatment all affect the final result.

What Is a Keratin Treatment and How Does It Work?

A keratin treatment is a chemical hair-smoothing procedure that uses a treatment solution followed by heat to change the appearance and texture of the hair. The product is applied to the hair and then sealed with heat, usually using a flat iron.

Applying a specialised product alters the hair shaft through specific chemical and physical stages:

• Rebuilds Weak Spots: The treatment fills in tiny gaps along damaged hair strands with protein, restoring a smooth, solid structure.

• Locks the Hair Surface: High heat from a flat iron coats the hair shaft and blocks atmospheric moisture, closing down the raised, rough outer layer.

• Blocks Out Moisture: By sealing every hair cuticle, it forms a waterproof barrier that stops damp air from making your hair frizzy.

What Are the Benefits of Keratin Smoothing Treatment for Hair?

A keratin treatment mainly makes hair easier to manage and style. It can be useful for people who regularly deal with frizz, rough texture, or hair that takes a long time to style.

Keratin treatments alter the outer hair shaft to deliver several cosmetic improvements:

• Less frizz: Smoother strands are less likely to develop a rough, frizzy appearance in humid conditions.

• Easier styling: Straightened and smoother hair usually takes less effort to comb and style.

• More shine: A smoother hair surface reflects light more evenly, which can make the hair look shinier.

• Softer texture: Dry or coarse hair may feel smoother after the treatment.

Is Keratin Treatment Good for Your Hair?

A keratin treatment can make hair look and feel better, but it does not repair damaged hair. The treatment changes the appearance and manageability of the strands rather than restoring damaged hair to its original condition.

This can help when styling is the main concern. However, hair that is already dry, bleached or fragile may be more vulnerable to further damage from chemical processing and repeated heat.

If your hair is already breaking or feels weak, treating the surface may improve its appearance without addressing the reason for the damage.

What Are the Side Effects of Keratin Treatment?

Keratin treatments can cause scalp irritation, unpleasant fumes and hair damage, depending on the ingredients used and how the treatment is performed. The risks also vary between products because keratin treatments do not all use the same chemical formulas. 

Keratin treatments carry specific chemical and heat-related hazards that depend on the active ingredients and treatment execution:

• Scalp irritation: Treatment chemicals can cause redness, itching or burning if they come into contact with the scalp.

• Eye and throat irritation: Some smoothing products can release irritating fumes when heated.

• Dry or brittle hair: Repeated chemical processing and high heat can weaken already fragile strands. High-heat flat irons exceeding 200°C can affect the hair proteins, leading to internal hair weakness, dryness, and severe breakage.

• Hair breakage: Damaged strands can become more likely to snap during brushing or styling.

• Changes in hair texture: Repeated smoothing can alter the natural texture of curly or wavy hair.

Note: Heating formulations containing formaldehyde or aldehyde-releasing chemicals vaporises gaseous toxins, causing respiratory tract irritation, throat discomfort, and eye watering.

Who Should Be Careful With Keratin Treatments?

People with fragile, heavily processed or irritated hair and scalps should take extra care before undergoing a keratin treatment. Certain health conditions and fragile hair types make chemical smoothing treatments unsafe for your scalp and strands. 

Specific physical conditions increase your susceptibility to heat-related and chemical damage:

• Have bleached or heavily coloured hair: Further chemical processing and heat may increase dryness and breakage.

• Have a sensitive or irritated scalp: Chemical contact can worsen existing irritation.

• Have very fragile hair: Heat and chemical processing can make breakage more likely.

• Are pregnant or breastfeeding: Check the ingredients and discuss the treatment with your healthcare professional, particularly if the product can release irritating fumes.

• Have a naturally curly or textured hair pattern: Smoothing can change the way your natural texture looks and behaves.

How Can You Reduce Hair Damage From a Keratin Treatment? 

You can reduce hair damage by choosing the product carefully, using appropriate heat, and avoiding repeated processing of already damaged hair.  Choose gentle products and check salon safety to keep your hair healthier. 

Choosing the product carefully, using appropriate heat, and avoiding repeated processing lowers safety risks:

• Check the ingredients: Ask the salon which smoothing formula it uses and whether it releases formaldehyde or other irritating substances when heated. 

• Tell the stylist about previous treatments: Bleaching, colouring and other chemical services can affect how your hair responds.

• Protect the scalp: The treatment should be applied according to the product instructions and kept away from the scalp when required.

• Use appropriate heat: The stylist should follow the temperature recommended for the specific product and your hair condition.

• Avoid unnecessary repeat treatments: Repeated chemical processing can add to existing dryness and breakage.

• Choose a well-ventilated salon: Good ventilation can reduce exposure to fumes during the treatment.

Caution - Avoid doing a keratin treatment at home unless the product is specifically designed for home use and you can follow its safety instructions correctly.

When Should You Look Beyond a Keratin Treatment?

A keratin treatment can change the appearance of your hair, but it cannot address persistent hair fall, scalp problems or thinning caused by an underlying condition.

Evaluating specific symptoms helps determine when to transition from cosmetic styling to targeted medical care:

• Hair fall that continues for several weeks.

• Noticeable thinning or widening of the parting.

• Sudden bald patches.

• Persistent scalp itching, redness or pain.

• Repeated breakage despite reducing chemical treatments.

• A clear change in hair density after a treatment.

A cosmetic treatment can improve how the hair looks while the underlying concern remains. When hair fall or thinning continues, identifying the cause is more useful than relying on repeated smoothing treatments.

Noticing hair fall or breakage after hair treatments?

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Frequently Asked Questions

What happens after 3 months of keratin treatment?

The protective keratin protein coating wears off after 3 months. It causes your hair's natural frizzy texture to gradually return alongside potential dryness or strand breakage.

Is keratin good for health or not?

Partially. Keratin smooths hair shafts cosmetically, but the treatment's high flat-iron heat and chemical fumes pose hidden risks to your hair health.

Which hair treatment is safest?

Nourishing scalp oils and deep conditioning treatments are safest. These treatments hydrate strands without using harsh chemical formulas or intense heat.

References :

• D'Souza P, Rathi SK. (2015). Shampoo and Conditioners: What a Dermatologist Should Know? Indian Journal of Dermatology, 60(3), 248–254. DOI: 10.4103/0019-5154.156355
• Gavazzoni Dias MF. (2015). Hair Cosmetics: An Overview. International Journal of Trichology, 7(1), 2–15. DOI: 10.4103/0974-7753.153450
• Weathersby C, Taylor SC. (2013). Hair Straightening Products and the Risk of Occupational Formaldehyde Exposure in Hairstylists. Clinical Toxicology, Department of Forensic Medicine & Clinical Toxicology, 68(3), 513–514. DOI: 10.1080/01480545.2018.1508215