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Guinness good for you
The long-running ad campaign is well-known
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 a low dose 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 Wisconsin team tested the health-giving properties of stout against lager by giving it to dogs who had narrowed arteries similar to those in heart disease.
They found that those given the Guinness had reduced clotting activity in their blood, but not those given lager.
Heart trigger
Clotting is important for patients who are at risk of a heart attack because they have hardened arteries.
A heart attack is triggered when a clot lodges in one of these arteries supplying the heart.
Many patients are prescribed low-dose aspirin as this cuts the ability of the blood to form these dangerous clots.
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.
"antioxidant compounds" in the Guinness, similar to those found in certain fruits and vegetables, are responsible for the health benefits because they slow down the deposit of harmful cholesterol on the artery walls.
However, Diageo, the company that now manufactures Guinness, said: "We never make any medical claims for our drinks."
The company now runs advertisements that call for "responsible drinking".
A spokesman for Brewing Research International, which conducts research for the industry, said she would be "wary" of placing the health benefits of any alcohol brand above another.
"It is possible that there is an extra effect due to the antioxidants in Guinness - but I would like to see this research repeated."
She said that reviving the old adverts for Guinness might be problematic - at least in the EU.
Draft legislation could outlaw any health claims in adverts for alcohol in Europe, she said.
Feelgood factor
The original campaign in the 1920s stemmed from market research - when people told the company that they felt good after their pint, the slogan was born.
In England, post-operative patients used to be given Guinness, as were blood donors, based on the belief that it was high in iron.
The UK is still the largest market in the world for Guinness, although the drink does not feature in the UK's top ten beer brands according to the latest research.
The long-running ad campaign is well-known
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 a low dose 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 Wisconsin team tested the health-giving properties of stout against lager by giving it to dogs who had narrowed arteries similar to those in heart disease.
They found that those given the Guinness had reduced clotting activity in their blood, but not those given lager.
Heart trigger
Clotting is important for patients who are at risk of a heart attack because they have hardened arteries.
A heart attack is triggered when a clot lodges in one of these arteries supplying the heart.
Many patients are prescribed low-dose aspirin as this cuts the ability of the blood to form these dangerous clots.
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.
"antioxidant compounds" in the Guinness, similar to those found in certain fruits and vegetables, are responsible for the health benefits because they slow down the deposit of harmful cholesterol on the artery walls.
However, Diageo, the company that now manufactures Guinness, said: "We never make any medical claims for our drinks."
The company now runs advertisements that call for "responsible drinking".
A spokesman for Brewing Research International, which conducts research for the industry, said she would be "wary" of placing the health benefits of any alcohol brand above another.
"It is possible that there is an extra effect due to the antioxidants in Guinness - but I would like to see this research repeated."
She said that reviving the old adverts for Guinness might be problematic - at least in the EU.
Draft legislation could outlaw any health claims in adverts for alcohol in Europe, she said.
Feelgood factor
The original campaign in the 1920s stemmed from market research - when people told the company that they felt good after their pint, the slogan was born.
In England, post-operative patients used to be given Guinness, as were blood donors, based on the belief that it was high in iron.
The UK is still the largest market in the world for Guinness, although the drink does not feature in the UK's top ten beer brands according to the latest research.
