The challenge has become more popular in recent years.
Improved mood, better sleep and enhanced productivity are some of the benefits to be seen by taking part in Dry January.
Many people will accept the annual challenge of abstaining from drinking alcohol for the first month of the year.
As well as physical health benefits for the liver and brain, there are also mental health perks.
Pharmacist in Mullingar, Eamon Brady, says the difference between alcohol being a tonic or a poison is in the dose: