The Perricone MD High Potency Retinol Recovery Overnight Moisturiser harnesses three forms of retinol to support the skin's natural renewal process. The moisturiser provides intense hydration to replenish the skin's moisture barrier, while helping to minimise the appearance of fine lines and wrinkles.Clinical Results:100% showed significant improvement in skin hydration**93% showed significant improvement in skin hydration for 12 hours*93% showed significant improvement in skin barrier function for 12 hours*80% showed significant improvement in skin brightness and radiance**Significant improvement in skin texture, tone and elasticity***In a clinical study of 30 women.**In a clinical study of 30 women after 8 weeks.