If you only buy one of the Elemis Pro-Collagen products, make sure it's the Pro-Collagen Quartz Lift Serum. This powerful but lightweight serum provides an immediate lifting and firming effect on the skin and reduces the appearance of fine lines and wrinkles. For best results use under Pro-Collagen Marine Cream during the day and under Pro-Collagen Oxygenating Night Cream in the evening. Suitable for all skin types, especially mature.