Double serum with a dual formulation, which for the first time in cosmetics combines 3 powerful anti-aging complexes: Pro-Retinol, Bakuchiol (retinol-like) and two mild fruit acids (AHA and PHA). A treatment designed exclusively for night use, already certified in Korea as a "therapeutic anti-wrinkle care". The pro-retinol double serum booster has achieved the impossible: combining anti-aging ingredients that by their nature could not coexist. Its exclusive dual formulation is the key: 1. Lipidic microemulsion (orange part) Enriched with two unique anti-aging complexes: Pro-retinol: a synergy of β-carotene, algae, carrot and sea buckthorn. Bakuchiol (retinol-like): with proven efficacy to stimulate collagen production, renew cells and protect elastin. 2. Aqueous gel (white part) Rich in mild fruit acids that maximize results: AHA (lactic acid) and PHA (gluconolactone): accelerate cell renewal and optimize active ingredient penetration. It is recommended to apply at night. Press the product once and mix the 2 formulas in the palm of the hand. Apply to the face and neck, avoiding the eye contour. To allow your skin to get used to the high concentration of active ingredients in the double serum, especially the mild fruit acids, start by applying the serum once every two nights during the first week. Then, use it every night in the following weeks. Frequency of use: Only at night. First application: Begin by applying the serum every other night during the first week. Then, use it every night in the following weeks to allow your skin to get used to the mild fruit acids. Do not apply in case of intense or prolonged sun exposure. In case of moderate sun exposure (<30 min/day), use sun protection. For external use only. Keep out of reach of young children. Store in a cool and dry place.