Ideal for sensitive skin or first-time retinol users. Helps reduce the appearance of fine lines and wrinkles, and deliver firmer, smoother looking skin. Periderm is Retinol (vitamin A) delivered in a protein-rich, oil-free, aqueous suspension allowing for maximum absorption, minimal irritation and visible results. Periderm Serums help to: Deliver softer, smoother skin Diminish the appearance of lines and wrinkles Provide the appearance of thicker, firmer, plumper looking skin