The average woman in the UK spends over £480 a year on skincare and beauty products*. But that can all be in vain if you’re not getting enough of the overnight restorative benefits of sleep. Below are four key ways that a lack of sleep can seriously salt your face game: HORMONES While we sleep, HGH (human growth hormone) levels surge. This hormone is responsible for accelerating your skin’s repair and regenerating your body’s cells. There is also some evidence that skin cells