Why Guinness really is the black stuff. Scientists say stout makes you bitter R
- The adverts always said Guinness is good for you. But it may be that drinking the black stuff makes you bitter as well as better.
In an intriguing study, scientists have linked tart tastes with an unforgiving mind.
And the more conservative a personís views, the more their thoughts are affected by their tastebuds.
The findings suggest that drinks such as stout, bitter and gin and tonic should be drunk carefully among friends.