Beauty Fact - Benefits of sleep
Once you are in a state of deep sleep, your skin cells repair. This is called mitosis and takes place roughly between 11pm and 4am.
By shortening the amount of time you spend asleep, you are reducing the body’s natural ability to do this, which leads to loss of moisture, lower levels of collagen and signs of premature ageing. This is why fine lines under the eyes are linked to tiredness.