Clarins’ Double Serum is one of the brand’s bestselling products for a reason, formulated to stimulate the five vital functions of the skin – hydration, nutrition, oxygenation, protection and regeneration – for a more youthful, radiant visage. Use it morning and evening on clean, dry skin; rotate the dial to select your ideal dose and enjoy a blend of 21 active plant extracts, including anti-ageing turmeric, which preserves communication between skin cells.