L’Oréal Professionnel launches Keratin Alpha Sleek hair care range

L’Oréal Professionnel has introduced Keratin Alpha Sleek, a new hair care line developed through 15 years of research. The range utilizes patented Keratin Alpha technology, which targets alpha-keratin—the structural protein responsible for hair shape, strength, and elasticity.

According to the brand, the complete routine—consisting of a shampoo, a weekly Smooth Transformer progressive treatment, a nourishing mask, and the Mirror Sleek serum—can provide up to two weeks of smoothness and frizz control. The products are designed to reduce styling time by half and offer thermal protection up to 230 °C via the serum.

To maintain hair health and extend the effects of chemical smoothing treatments, such as progressive brushes, experts emphasize the importance of a hair schedule that balances hydration, nutrition, and reconstruction. Maintaining a proper routine helps seal hair cuticles and prevents the loss of smoothing films caused by frequent washing.