Create the illusion of smoother, balanced skin with the Biotherm Blue Therapy Blue Retinol Night Concentrate, a cream formula supercharged with pro-retinol to promote the look of revitalised skin.Melting effortlessly into the complexion, the rich cream harnesses a retinol derivative to help promote a skin-resurfacing effect. The cream utilises a gentle form of retinol to help unify your skin tone while sealing in hydration. Seeking to refine the skin tone overnight, the dual-action moisturiser is ideal for those new to retinol or for sensitive skin types.