What Is Keratin Hair Straightening and Is It Suitable for Everyone?

"Straightening" is a conditional term; it's more about smoothing and disciplining the hair. Initially, this procedure was designed to restore and treat hair.

A keratin-based solution is temporarily "sealed" into the hair structure under high temperatures, leaving it shiny, strong, and straightened as a side effect. This appealing "side effect" is often emphasized in marketing. However, if you have strong and resilient curls, keratin straightening won't turn them perfectly straight without styling. Instead, your curls will become more manageable and wavy. Naturally curly hair will turn wavy, and wavy hair will become straighter. Only naturally straight hair will achieve the effect of perfectly smooth, glossy strands.

Keratin is a natural protein that makes up our hair. By restoring it, all types of hair gain vitality and shine.

Aftercare for Keratin Straightening

Special care is necessary after the procedure:

1. Shampoo: Switch to sulfate-free shampoos, as regular ones can strip keratin.
2. Avoid Oils and Masks: For several months, refrain from using oils and masks, as they can either weigh down the hair or disrupt the keratin layer, causing it to wash out faster.

The longevity of the results depends on your lifestyle. Frequent swimming, washing your hair, or exposure to salty water and intense sunlight will shorten the effect.

Coloring Hair and Keratin

If you've recently dyed your hair, note that keratin straightening can lighten the color by about half a shade. Plan accordingly and inform your colorist. Opt for a slightly darker shade if coloring before the procedure. The process seals both the keratin and pigment, making the color last longer. Avoid coloring after keratin straightening, as it diminishes the results. The only exception is root touch-ups, as the keratin is applied 3–4 cm away from the scalp.

Styling and Maintenance

After keratin straightening, you can style your hair however you like. Want curls again? You can safely use curling irons, rollers, or straighteners without affecting the treatment's results.

Myths About Keratin

1. Hair Growth and Loss: Keratin does not affect hair growth or loss since it doesn’t come into contact with the scalp.
2. Volume and Thickness: Keratin does not increase hair thickness or density; the illusion of volume comes from the coating effect. Severely damaged or porous hair will show the most noticeable improvement.

Limitations of Keratin

Keratin does not fix split ends. These remain unchanged and can only be addressed through trimming, either before or after the procedure.

Formaldehyde Concerns

Some manufacturers claim their keratin formulas are free of formaldehyde. While technically true, formaldehyde gas is released during chemical reactions with keratin under heat. The amount is minimal and varies by brand. The presence of odor during the process does not affect service quality or client safety.

Duration of Results

The effects of keratin straightening last about 3–5 months and do not accumulate over time. As the keratin washes out, the hair returns to its original state. Damaged areas will require reapplication to maintain the benefits.