O’s corrective serums are concentrated, potent, highly active and focused on tackling specific skin conditions head on, employing specialised medical grade ingredients that offer intense and long-term results. In short – they pack a real skin health PUNCH. Think of Serums as REALLY hard workers who go above and beyond to deliver the best outcome, without which your skin simply can’t function at its best. Because of this it’s essential that your serums, which are multi-functional and perfect for layering, are prescribed by an O Skin Expert to ensure maximum results and a tailored approach to your individual concerns.