The old advertising slogan "Guinness is Good for You" may be true after all, according to researchers.
A pint of the black stuff a day may work as well as an aspirin to prevent heart clots that raise the risk of heart attacks.
Drinking lager does not yield the same benefits, experts from University of Wisconsin told a conference in the US.
Guinness were told to stop using the slogan decades ago - and the firm still makes no health claims for the drink.
The researchers told a meeting of the American Heart Association in Orlando, Florida, that the most benefit they saw was from 24 fluid ounces of Guinness - just over a pint - taken at mealtimes.
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