Dramatically rejuvenate rough, resilient skin with the Renew Advanced Retinal Serum from Osmosis Skincare.As part of the Osmosis Skincare classification of their Vitamin A serums, this one is a Level 4 formula and contains the highest concentration of specialist Vitamin A derivative, Retinaldehyde. This stimulates collagen production and brightens uneven tone, while a restorative blend of Hyaluronic Acid, Niacinamide and Peptides work to address the visible signs of ageing. Over time, skin becomes smoother and firmer.Suitable for normal and ageing skin types, massage one or two pumps into cleansed skin twice a day for best results.