[permaculture] Guzzling coffee may cut heart disease - health - 16 June 2008 - New Scientist
Lawrence F. London, Jr.
lflj at intrex.net
Tue Jun 17 22:10:54 EDT 2008
Guzzling coffee may cut heart disease - health - 16 June 2008 - New Scientist
A strong cup of coffee in the morning can feel like a life saver. Now, one of the largest and longest studies of coffee
drinking suggests that coffee may indeed boost your lifespan – providing you drink enough of the stuff, that is.
The study tracked 129,000 men and women over two decades. It found that people who consumed several cups of coffee every
day were less likely to die of heart disease than those who shied away from the stuff. Heart disease is an umbrella term
for conditions including heart attacks, stroke, and arrhythmia. The researchers found that women who drank four to five
cups per day were 34% less likely to die of heart disease, while men who had more than five cups a day were 44% less
likely to die. Consumption caution The new report adds heft to the hypothesis that coffee can stem heart disease,
perhaps by battling the inflammatory damage associated with early stage illness. "It looks like coffee has some effect
that hasn't been established before. The general idea is that coffee is not so bad," says study leader Esther
Lopez-Garcia, an epidemiologist at the Autonomous University of Madrid. Yet Lopez-Garcia and other experts caution that
it's too early for people to act on the study's findings. "Before declaring that drinking up to seven cups of coffee per
day is beneficial for health, we should wait for some other confirmation," warns Francesco Sofi, an epidemiologist at
the University of Florence, who was not involved in the study. The new study is not the first to connect coffee drinking
with good health. Over the years, other research has linked coffee consumption with lower rates of heart attack, liver
cancer and diabetes. Less risk of death. One limitation of previous studies, Lopez-Garcia says, was their measure of
coffee drinking – often noted at the beginning of the study and assumed to stay constant for several years or even
decades. Her team instead measured coffee consumption through surveys performed every couple years under two studies of
the health impacts of dozens of dietary and environmental factors, from vitamin E to drinking alcohol.
Beginning in 1980, the researchers collected coffee consumption statistics for 86,214 women enrolled in a study of
nurses' health. And in 1986 they began collecting data for 41,736 men involved in a follow-up study of health
professionals. When Lopez-Garcia's team ended their analysis in 2004, 6,888 men and 11,095 women had died, many from
cardiovascular disease. For both groups, coffee seemed to give a health boost. After accounting for other factors such
as smoking and obesity, the researchers found that women who drank four to five cups of coffee per day were 26% less
likely to die from any cause. Men who put down more than five cups of coffee per day were 35% less likely to die.
"The more coffee you drink the less risk of mortality you have," Lopez-Garcia says. Differing results. However, her team
noticed an even more dramatic effect in deaths caused by cardiovascular disease. She speculates that anti-inflammatory
compounds found in coffee may be responsible for its apparent health benefits. This is in spite of high levels of
caffeine, which might increase the chances of suffering a heart attack by raising blood pressure. "Our hypothesis is
that caffeine has a short term effect, but in the longer term, [other aspects of coffee are] more important," she says.
Other studies have, however, shown just the opposite. In 2007, Sofi analysed more than 20 studies of health and coffee
drinking and found little consensus. One explanation for these conflicting results could be genetic. In 2006, a team of
Canadian researchers discovered that people with a mutation in a gene involved in metabolising caffeine had higher rates
of heart attack than people without the mutation.
More information about the permaculture