Thanks to a double innovation ? both scientific and technological ? that empowers the Double Serum with exceptional properties to combat the major signs of skin ageing. With a pioneering double formula, a total of 21 effective anti-ageing water and oil-soluble ingredients are combined in one bottle to reverse signs of ageing and stimulate 5 vital skin functions ? regeneration, nutrition, hydration, oxygenation and protection. The ultimate 2-in-1 Double Serum is the complete age control concentrate essential for every woman to stay young and look fabulous. HOW TO APPLY Double Serum also boosts the efficacy of your anti-ageing cream. Apply before your Clarins day or night cream for optimal anti-ageing performance.