Corrects, inspired by aesthetic acts This wrinkle-correcting serum combines the high effectiveness of renowned cosmetic medicine active ingredients: hyaluronic acid, glycolic acid, and a relaxing cutaneous active ingredient. With its lightweight, meltingly soft texture, HYALUPERF-SERUM's effectiveness stems from its dual hyaluronic acid blend for intense plumping and anti-wrinkle action. Its formula also contains glycolic acid to improve skin texture and appearance and a muscle-relaxing active ingredient that reduces cutaneous contractions to fill wrinkles. The skin is left relaxed and hydrated, with smoother features and an even complexion. Main Active Ingredients: Hyaluronic Acid Glycolic Acid To use: Apply morning and night before your Réponse Corrective day and night creams.