straight hair for months without damaging them thanks to keratin, but be careful, they are not all the same.


Keratin is a protein that constitutes the main component of hair, nails, and skin. It is a fundamental substance for the health and appearance of our hair, helping to keep it strong, elastic, and shiny.

Hydrolyzed keratin is a form of keratin that is used in many hair products, including keratin smoothing treatments. This form of keratin has been broken down into smaller particles to make it easier to apply to the hair and to be absorbed by the hair fiber. Hydrolyzed keratin is often used in hair products because it has the ability to penetrate deeply into damaged hair, helping to rebuild the structure of the hair and make it stronger and more resilient.

However, many hair products containing hydrolyzed keratin also contain formaldehyde, a chemical compound that can be harmful to human health. Formaldehyde has been classified as a carcinogen by the World Health Organization and can cause skin, eye, and respiratory tract irritation. In Switzerland, the use of hair products containing formaldehyde in beauty salons is officially prohibited.

Despite the ban in Switzerland, many hairdressers continue to use products containing formaldehyde in their keratin smoothing treatments, often because of the immediate and surprising results that these products can offer. However, the risks to the health of hairdressers and their clients are real and can be very serious.

To avoid these risks, it is important to use hair products that do not contain formaldehyde, such as NIKA’s MAXIMUM keratin treatment. MAXIMUM is an innovative formaldehyde-free keratin smoothing system that uses a unique formula based on vegetable keratin and other natural ingredients to offer exceptional results without compromising the health of hairdressers and their clients.

In conclusion, keratin treatments can be a fantastic option for those who want smooth, soft, and shiny hair. However, it is important to choose hair products that are safe and free of harmful chemical substances such as formaldehyde. By choosing products like NIKA’s MAXIMUM, hairdressers can offer their clients the best results without risking their health or that of their clients.