'Clarins Double Serum has been the number one anti-ageing serum in the UK since 2013 - in fact, one sells every four seconds worldwide. But, I can't say I'm surprised when it effectively targets five vital skin functions for visibly younger-looking skin.' - Kate, Escentual Beauty Team.   Why You'll Love Clarins Double Serum: Multi-award-winning facial serum from Europe's leading skincare brand. Packed with 21 active plant extracts to target the major signs of skin ageing. Leaves skin looking firm, even and radiant by smoothing fine lines and shrinking pores. Features a unique hydrolipidic and biomimetic formula to stimulate skin day after day.   What You Need To Know: The Clarins Double Serum Concentrate is the best in class when it comes to anti-ageing skincare. Wrinkles, firmness, dullness - this best-seller will improve it all by boosting hydration, radiance and collagen while tackling the effects of ageing, stress and pollution. And the proof is in the purchases; one bottle of Double Serum sells every four seconds worldwide. Clarins first released Double Serum in 1985. Since then, the award-winning formula has been reformulated no less than eight times to ensure it contains the most innovative and effective ingredients. Now, the hydrolipidic (water) and biomimetic (oil) double formula contains 21 potent plant extracts. This includes the newest star ingredient, turmeric, which is known for its anti-ageing properties.   Why It's Escentual: To date, Clarins Double Serum is said to have won nearly 400 beauty awards worldwide. But we can't say we're surprised. It's a cult status serum that you just can't get enough of. The thing that really sets Double Serum apart, though, is the fact that Clarins continue to update and innovate this icon to ensure you're getting the best Double Serum possible. This is the latest version - in its eighth phase - which goes to show that Clarins won't settle. They could have stopped at an incredible formula, but they didn't. Double Serum's bottle is just as impressive. Firstly, it's made from 10% recycled material, and secondly, the dual-chamber pump has an adjustable push dial button that dispenses a made-to-measure dose, so you never have to guess how much to use ever again!   The Best Way To Use It: Use Clarins' anti-ageing treatment as the second step in your skincare routine, directly after cleansing. Dispense into the palms of your hand and gently press into the face and neck before following up with a moisturiser. If you have oily skin, or are using the serum in the morning, switch the dial to the smaller droplet. If you have dry skin or are using the serum at night, turn the dial to the larger droplet for a more intensive dose.   The Sustainable Side: The Clarins Double Serum - Complete Age Control Concentrate is held in a recyclable cardboard carton that's sourced from sustainably managed forests. There's no longer a leaflet inside. Instead, Clarins have put all vital information, including how to use Double Serum, on the inside of the box to reduce unnecessary excess waste. The bottle itself is made using 10% recycled materials.   Values: Dermatologically-tested. Non-comedogenic.