Institut Esthederm Intensive Vitamine C² Double Concentrate Serum is a skincare formulation designed to support skin radiance and resilience. This serum combines two forms of vitamin C, ascorbic acid and ascorbyl glucoside, to provide a stabilized concentration of the active ingredient. The formula is intended to help protect the skin from environmental stressors while contributing to a more even skin tone and a visibly smoother texture.

The product is suited for individuals seeking to address signs of fatigue or dullness in the complexion. It may be particularly relevant for those with normal to combination skin types, though its gentle composition allows for use on sensitive skin when introduced gradually. The serum is packaged in a dual-chamber system that separates the vitamin C powder from the liquid base, ensuring freshness and potency until the moment of activation. This design helps maintain the stability of the active ingredients without the need for excessive preservatives.

Key ingredients include hyaluronic acid, which provides hydration to support skin plumpness, and a mineral-rich thermal water base that soothes and reinforces the skin barrier. The texture is lightweight and absorbs quickly, making it suitable for layering under moisturizers or sunscreen in a daily routine. The fragrance-free formulation reduces the risk of irritation, and the product is free from parabens and silicone.

This serum is best applied in the morning or evening after cleansing and before a moisturizer. It can be integrated into a broader skincare regimen focused on antioxidant protection and gradual improvement in skin luminosity. The concentrated nature of the serum means a small amount is sufficient per application, and consistent use over several weeks may help maintain a refreshed appearance without drastic or instant changes.