The Intensive Vitamine C² Double Concentré serum is the first serum with two types of vitamin C that ensures immediate and prolonged effectiveness. It achieves this thanks to its combination of pure Vitamin C (10%) and Pro-Vitamin C (2%). The results: brighter, smoother skin with fewer spots. The formula of the Intensive Vitamin C² Serum is 100% fresh and pure. It is preserved until the first use, thanks to its double-compartment packaging, which guarantees optimal conservation of pure vitamin C. Benefits: Immediate luminosity, antioxidant, anti-stain and smoothing action. Inhibits tyrosinase, the enzyme responsible for pigmentation. Considerably lightens hyperpigmentation caused by the sun and free radicals. Antioxidant protection. Triggers cell differentiation, thus improving the appearance of the skin. Protects keratinocytes and enhances epidermal reconstruction. Stimulates the synthesis of collagen and inhibitors of collagen degradation. How to use: For an effective and professional application, follow the step by step.