Mode of biological action Bioderma Laboratories has developed LumiReveal™ technology, which works at all stages of dark spot formation. Featuring a cell renewal boost, the products mode of action is inspired by dermatologists gold standard: Works at every biological stage of dark spot formation, to remove them whether they are just appearing or established Prevents the formation of new spots related to skin damage and the resulting inflammation. Optimizes cell renewal to eliminate excess melanin in cells. Pigmentbio C-Concentrates high concentration of AHAs offers peel-like effectiveness without damaging or drying out the skin, thanks to the 8-hour hydration it provides. Pigmentbio C-Concentrate eliminates cells with high concentrations of melanin, reduces the intensity and size of existing marks, and smooths skin texture to better reflect light. Skin regains its radiance. Like the other products in the range, it has a high concentration of essential vitamins for the skin, which enhances its benefits: they improve hydration and protect the skin against oxidative stress to prevent premature skin aging. From the first week, your skin glows and is strengthened against external attacks. Day after day, your skin is transformed, your complexion is evened out, and your skin regains its original appearance. Lasting Instructions for use For first use, press firmly with both thumbs on the packet cap until the container is fully engaged to release vitamin C. Unscrew the white cap and check that all the vitamin C powder has been released. Screw on the dropper and shake for 10 seconds to mix the vitamin C. Apply 5 drops every night for 1 month to your face and neck after cleansing with Pigmentbio H2O or Pigmentbio Foaming Cream. It can be applied alone or before Pigmentbio Night Renewer at night. In the morning, we recommend using Pigmentbio Daily Care SPF 50+. Avoid the eye area. Follow the directions for use. You may experience tingling sensations related to the mechanism of action, which should disappear quickly. If irritation persists, discontinue use and consult a healthcare professional. Avoid prolonged sun exposure when using this product. If exposed, apply appropriate sun protection. Ingredients - INCI AQUA / WATER / EAU, Propanediol, Glycolic Acid, Glycerin, Dipropylene Glycol, Propylheptyl Caprylate, Sodium Hydroxide, Ascorbyl Glucoside, Niacinamide, Salicylic Acid, Ammonium Acryloyldimethyl Taurate / VP Copolymer, Sorbitan Sesquioleate, Pentylene Glycol, Tocopheryl Acetate, Xanthan Gum, Sodium Citrate, Lysine, Azelaic Acid, Mannitol, Xylitol, Sodium Metabisulfite, Andrographis Paniculata Leaf Extract, Rhamnose, Isomerized Saccharide, Glycyrrhiza Glabra (Licorice) Root Extract, Tocopherol, Fructooligosaccharides, Caprylic / Capric Triglyceride, Laminaria Ochroleuca Extract, Fragrance (Parfum)