L’Oréal Professionnel Serie Expert Keratin Alpha Sleek Serum 50ml

• Reprogram hair for up to 2 weeks of frizz control¹
• Seals hair keratin for long-lasting results
• Deliver instant shine that lasts up to 5 days²
• Fights against up to 80% humidity³ with heat protection up to 230°C (450°F)⁴, controlling unwanted volume for daily styling in half the time⁵
• The fragrance is Fig Leaf, Creamy Sandalwood, Orris and violet

¹Consumer test on 68 participants, 1 application/week for 4 weeks. Based on a 15-day break observation.

²Instrumental test after 1 application of shampoo, mask & serum.

³Instrumental tests, with full routine after 4 uses of the Smooth Transformer.

⁴Instrumental tests.

⁵Instrumental tests with routine 4 times of Shampoo + Smooth Transformer + Leave-on.

L’Oréal Professionnel Keratin Alpha Sleek Mirror Serum is a high-performance finishing serum designed to deliver ultra-smooth, glass-like shine with long-lasting frizz control. Perfect for unruly, frizz-prone, or chemically treated hair, this lightweight formula instantly transforms dull, rough strands into sleek, polished perfection without weighing the hair down.

Infused with keratin-inspired smoothing technology, the serum helps to refine the hair’s surface, improving manageability and enhancing softness with every use. It works to tame flyaways, reduce the appearance of split ends, and protect against humidity, keeping your style smooth and controlled throughout the day. The result is visibly healthier-looking hair with a luminous, mirror-like finish.

Suitable for all hair types seeking smoothness and shine, this salon-quality serum delivers professional results at home. Elevate your styling routine and achieve impeccably sleek, radiant hair that feels as luxurious as it looks.