The L'Oréal Paris Glycolic Gloss Extension Serum is a leave-in hair treatment designed to deliver intense shine and smoothness to dull, lifeless hair. Powered by a 3% Glycolic Acid Complex, it works at the cuticle level to smooth rough and uneven hair surfaces. The formula helps seal moisture inside the hair fiber, improving overall texture and softness. It provides up to 72 hours of glossy, mirror-like shine with consistent use. The serum enhances light reflection, giving hair a polished, salon-like finish. It also helps reduce frizz and flyaways, making hair more manageable and sleek. The lightweight texture ensures it does not feel greasy or heavy on the hair. It can be used on both damp and dry hair, offering flexibility in styling routines. The serum also forms a protective layer that shields hair from environmental damage and humidity. With regular use, it improves hair strength and overall quality. It is suitable for all hair types, especially dull, porous, or frizz-prone hair. The formula spreads easily through mid-lengths and ends without buildup. It works well as a finishing product to enhance shine after styling. This serum focuses on surface smoothing and shine rather than deep repair. Overall, it is built for people who want glossy, smooth, and visibly healthier-looking hair without heaviness