National monuments are set in stone; visible signs of ageing are not. The good news science is starting to confirm: even if you’ve passed 40, it’s possible to turn back the clock on your skin and actually undo signs of damage.

“Absolutely, starting later is dramatically better than not at all,” explains Dr Bryan Mendelson, an aesthetic surgeon. Here, leading dermatologists share the simple secrets that can reverse the damage and male all the difference between looking your age and, well, looking ageless.

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