See a Visible Difference in as little as 6 days* when using the new Elizabeth Arden Visible Difference Optimizing Skin Serum together with the spa-inspired skincare regimen. This serum uses Elizabeth Arden's retinyl complex to gently retexturise skin while preparing skin to receive the benefits of your unique skin type regimen. Reveals healthy, glowing skin tone. * Based on US in-home use consumer test of Visible Difference Optimizing Skin Serum on 55 women aged 30-50. In a perfect world, your skin would repair & replace damaged cells so quickly that you’d have a continuous, healthy glow. In the real world, our skin needs a little help. Elizabeth Arden have optimised 100 years of spa science to create a serum that gives your skin a healthy advantage. This advanced treatment formula with Elizabeth Arden's exclusive retinyl complex renews skin’s clarity & texture as it evens skin tone. Suitable for all skin types, even sensitive skin. Dermatologist & clinically tested. Non-comedogenic. Sensitive skin tested. Best for: All skin types.