Have you ever noticed that in the morning your skin looks its best, or a little oily in the afternoon and by the evening those fine lines and wrinkles look deeper? It’s not your imagination, it’s your circadian rhythm. What is that you may ask? let me explain...Circadian rhythms are distinct periods of biological activity that occur when we are awake and when we are asleep, controlled by the way the body’s biological clock responds to light and dark.Each and every cell in our body has a circadian rhythm. What this means for your skin is that at different times of the day, different processes are occurring. When our clock is disrupted, it’s our skin that reflects this imbalance first.During the day your skin cells switch on to protect themselves against environmental stresses, such as pollution, heating, air conditioning and exposure to UV light, all of which contribute to aging This peaks between midday and 3pm.At night while you are sleeping, skin cells go into restore mode, repairing daytime damage, growing new cells and bringing fresh blood to the surface for cycling oxygen and nutrients leading to a boost in hydration. Your skin reaches its peak reparative state between 10pm and midnight.So, if you are not getting the sleep you need when you need it, your skin will suffer. Studies have shown that lack of sleep, which is either the result of a disrupted circadian rhythm, or a cause of it, results in increased fine lines and wrinkles. In saying that, don’t stress if you have had a few sleepless nights, it’s when it becomes chronic that these side effects occur.You can also give your skin a helping hand with products that help your skins circadian rhythm function in a healthy way.At night my go to product is Dermalogica's Sound sleep cocoon. It boosts radiance by replenishing the hydration skin loses throughout the day and delivers active ingredients at night, when skin is at its most receptive and encourages restful sleep with essential oils. Smooth over face and neck as the last step of your night time regimen, over toners and targeted treatments. You may also layer Sound Sleep Cocoon over your preferred moisturiser to further enhance overnight hydration.