Jury still out on benefits of coffee
Your support helps us to tell the story
From reproductive rights to climate change to Big Tech, The Independent is on the ground when the story is developing. Whether it's investigating the financials of Elon Musk's pro-Trump PAC or producing our latest documentary, 'The A Word', which shines a light on the American women fighting for reproductive rights, we know how important it is to parse out the facts from the messaging.
At such a critical moment in US history, we need reporters on the ground. Your donation allows us to keep sending journalists to speak to both sides of the story.
The Independent is trusted by Americans across the entire political spectrum. And unlike many other quality news outlets, we choose not to lock Americans out of our reporting and analysis with paywalls. We believe quality journalism should be available to everyone, paid for by those who can afford it.
Your support makes all the difference.Women who drink coffee are less likely to commit suicide than those who do not, suggests a study published today. But the author says the results may not be significant, because doctors might have told depressed patients not to drink coffee, a factor that was not studied.
The study of 86,626 nurses in 1980-90 found 11 suicides among those who drank two to three cups of caffeinated coffee a day compared to 21 cases among colleagues who said they almost never drank coffee.
"Coffee drinkers seem to do everything that seems to put them at risk for depression and suicide but they are highly protected," said the study author, Ichiro Kawachi, of Harvard Medical School and Brigham and Women's Hospital, Boston. He said many coffee drinkers lead stressful lives and smoke and drink heavily. The study did not examine whether respondents were told not to drink coffee, nor question the effect of caffeine on people who attempt suicide. Dr Kawachi said the issues merit further study.
A 1990 study found 100mg of caffeine a day could produce increased feelings of well-being, energy and motivation to work. A 5oz cup contains 40 to 180mg of caffeine, the US Food and Drug Administration says.
John Greden, an expert in depression at the University of Michigan, said researchers should have examined the effect of anti-depressants and blood-pressure medication, which tends to be a depressant. They also should have looked at how many suicide victims tried to stop smoking, which also can trigger depression.
"The findings could have nothing to do with caffeine," Dr Greden said.
Join our commenting forum
Join thought-provoking conversations, follow other Independent readers and see their replies
Comments