WHAT HAPPENS TO OUR SKIN OVERNIGHT?
68% of our customers notice a change in their skin following a bad night’s sleep**. Taking a closer look at our skin’s circadian rhythm reveals why this may be the case. Sleep plays a pivotal role in ensuring a healthy skin barrier function. Sleep is important for maintaining the skin’s protective surface lipid layer, which is responsible for night-time repair. The vital lipid layer ensures optimal barrier function & hydration for efficient recovery from damage accumulated during the day.
The vast majority of water loss through skin barrier (TEWL – trans epidermal water loss) occurs at night-time, leaving skin’s barrier unstable and vulnerable overnight. When sleep is disrupted, skin sebum levels at night are depleted and the barrier becomes compromised, creating sub-optimal skin repair (increased TEWL) and recovery conditions. As a result, skin is incompletely repaired by morning, and daily damage accumulates. This leaves skin dry, dull, roughly textured, with visible fine lines in the morning. Over time, these effects can evolve into early skin ageing signs.
** Survey of 97 participants from www.kiehls.co.uk email database, conducted January 2021.