L'Oréal Professionnel Keratin Alpha Sleek Mirror Serum

Seal in smoothness while protecting hair against heat damage and humidity with this serum.

• Anti-humidity: up to 80%*
• Reprogram hair for up to 2 weeks of frizz control**
• Controls unwanted volume for daily styling in half the time***

Unlock long-lasting smoothness and shine with this advanced serum. The formula protects against the effects of humidity and shields hair from heat damage, sealing the hair's keratin structure to leave lengths looking sleek and silky.

*Instrumental test after 1 application of shampoo, mask & serum. **Consumer test on 68 participants, 1 application/week for 4 weeks. Based on 15-day break observation. ***Instrumental tests with 4 uses of the Shampoo + Smooth Transformer + Serum routine.