L’Oreal Professionnel Keratin Alpha Sleek is a revolutionary professional smoothing treatment that delivers unparalleled softness and control.

Carefully developed to meet the needs of all hair types, from the finest to the thickest, natural, color-treated, or curly, this innovative treatment offers extraordinary results, both visible and tangible.

With each application of the Smooth Transformer, your hair is transformed: it becomes not only incredibly silky but also up to 5 times smoother**, saying goodbye to knots and tangles. Reduce frizz by half**, even in challenging weather, and enjoy effective volume control** for a structured, manageable hairstyle without weighing your hair down.

In addition, its formula instantly adds 77% more shine**, for visibly healthy and radiant hair. Best of all, this treatment cuts your daily styling time in half**, saving you precious minutes in the morning.

Finally, it remarkably preserves the natural integrity of your hair**, leaving it stronger and more resilient. **Instrumental test after 4 applications of the shampoo + transforming treatment + Keratin Alpha Sleek serum routine.

**Instrumental test after application of the smoothing treatment.

***Instrumental test after 4 applications of the Shampoo + Smoothing Treatment + Serum program.