A lot of the symptoms associated with a hangover are a product of sleep deprivation.
Alcohol affects our ability to get into what is known as rapid eye movement (REM) sleep, the bulk of which occurs in the last two-thirds of the night. As a rule of thumb, it takes about an hour to metabolize one unit of alcohol, so if you have a 250ml glass of wine at 7 pm it will mostly be out of your system by 10.30pm.
Our molecular clock inside our cells aims to keep us in sync with the sun.
When we disregard this circadian rhythm, we are at a greater risk for illnesses such as diabetes, heart disease, and dementia.
The average adult spends 36 % (or about one-third) of his or her life asleep.
Purpose of Sleep: