But researchers are usually careful to warn that their recommendations should not be used to encourage anything more than moderate drinking.
A study earlier this year found that going to the pub a few times a week is healthier than not drinking at all – provided drinkers restrict themselves to fewer than two pints of beer or a couple of glasses of wine.
The research, conducted in Japan, found that frequent but moderate alcohol consumption can reduce the chances of fatty liver – the cause of many diseases – by up to 60%.
A study last month found that drinking just a glass of wine a day may actually help people to lose weight.
Academics said that previous assumptions about a link between alcohol and obesity had been inaccurate.
Although heavy drinkers are likely to put on weight, those who enjoy just an occasional tipple are unlikely to pile on the pounds.
Other research has suggested that moderate drinkers may reduce the risk of developing diabetes or metabolic syndrome – which increases the risk of stroke or coronary artery disease.
The NHS recommends that men should not regularly drink more than 3 to 4 units of alcohol a day with 2 to 3 units the level for women.
A pint of strong lager or large glass of wine represents 3 units while a standard pint of lager or standard glass of wine contains 2 units.
What of Guinness? A study in 2007 found the slogan may be true after all, showing that the stout may prevent heart attacks.