People who give up alcohol will start seeing the benefits almost straight away.

Dr Niall Campbell, a doctor at The Priory and an expert in alcohol addiction, has written a guide which shows how a drinker’s body recovers when they quit the booze. He created a timeline for The Daily Mail, which shows that your body will start to clear the alcohol from your system within 24 hours of your last drink.

When you stop drinking, your blood sugar levels start to return to normal and your mood should improve as well. Dr Campbell pointed out that former drinkers will not only feel more clear-headed, they will also be richer too as they will save the money they normally spend on alcohol.

Within seven days, you are likely to start sleeping better because drinking alcohol makes you more unsettled at night.

Dr Campbell said: “Alcohol is very bad for sleep, leading to a fitful night. You may think it gets you off to sleep but you are likely to wake up and want to go to the bathroom.”

People often wake up after drinking because their body has become dehydrated. This is because alcohol causes the body to sweat more and this is the reason you will usually wake up feeling thirsty after a night on the bottle.

Your energy levels will improve when you stop drinking

You will also start to feel less exhausted within a week. The reason your energy levels plummet when you drink heavily is because your blood cells expand and are less able to efficiently transport oxygen around your body.

According to Dr Campbell, recovering drinkers will start to lose weight within two weeks of quitting. A large glass of wine is typically more than 200 calories so by removing these additional calories from your diet, you will find it easier to lose weight.

And after three weeks, your blood pressure is likely to lower. People who drink heavily often suffer from high blood pressure due to the extra calories they are consuming and the fact they are becoming dehydrated on a regular basis.

Other long term benefits of quitting alcohol include improving the health of your liver and boosting your energy levels.

Drug and alcohol tests are a useful way to monitor someone who is giving up drinking. Regular tests can check progress and help identify relapses quickly so they can be given the right kind of support to continue their recovery.

Some employers use workplace alcohol testing as a way to support recovering alcoholics as they return to the workplace. And random testing can identify employees who may be misusing alcohol in the workplace, which could increase the risk of accidents at work and affect productivity.