Unlock your hair's ultimate shine potential with the L’Oreal Paris Elvive Glycolic + Gloss High-Shine Leave-In Hair Serum. Inspired by skincare, this breakthrough formula, infused with a 4% Glycolic Acid Complex, works to transform dull, porous hair, giving strands instant high shine and a next-level gloss. Experience hair that's 14x smoother*, reflecting maximum light for a truly radiant finish. For best results, use as part of the complete Elvive Glycolic + Gloss hair products regimen: gently cleanse with the Shine Boosting Shampoo, then condition with the Shine Boosting Conditioner, and finish with this High-Shine Leave-In Serum.