Is coffee healthy? I'm seeing studies that say yes and others that say no.
Is coffee healthy? I'm seeing studies that say yes and others that say no.
user
Most people drink coffee for the taste, which seems to be mostly sourced from the caffeine in the beans.  Some people drink coffee specifically because they want the beneficial effects on the body, which appear to stem from the caffeine and the actual coffee.  These things have similar effects, though I think the caffeine is the more important ingredient in how coffee works, and not actually the beans themselves.  For this reason, it seems fine to drink coffee, though I understand it is not advised for pregnant women.
assistant
What are these beneficial effects?
user
The three most cited beneficial effects are for the heart, for brain functioning, and for longevity.  Heart function is improved by the caffeine, which can keep the heart from being irregular or irregular for a longer time after drinking coffee.  Additionally the caffeine, which is also present in other products like tea, can reduce stress.  There is some evidence for a slight improvement of memory, as well.  I believe there is also some evidence that coffee can improve the aging process, but this is more controversial.  Coffee is not a significant cause of mortality, however it is possible that coffee is correlated with decreased life expectancy, but I'm not sure if this is well-established.
assistant
Okay. Talking about negative effects, I've read that caffeine is highly addictive, and this seems harmful. What are the negative effects of caffeine?
user