Guinness Mid-Strength, which has an alcohol level of 2.8% compared to 4.1% in regular Guinness, will be available in 13 selected pubs, bars and hotels in Fife and Edinburgh.
Diageo says the trial demonstrates its commitment to the Scottish Government and Alcohol Industry Partnership and Fife Alcohol Partnership projects.
The Partnership brings together the Scottish Government and members of the alcohol industry to explore different approaches to tackling alcohol related harm.
Nicola Sturgeon, Scottish health secretary, says she welcomes the initiative “because it offers consumers a lower-alcohol alternative”, adding that giving consumers this kind of choice “is crucial in creating a culture where it’s acceptable and normal to opt for lower-alcohol products.”
The Scottish Government proposed a range of measures earlier this year to tackle alcohol misuse including plans to impose a minimum price per unit.
The trial will continue for 3 months and will then be evaluated.