tea is better. coffee has Caffeine in it, and caffeine is bad.
To the average american, coffee is a daily habit. But little do they realize the implications of drinking this roasted bean...
Coffee is linked to heart disease, according to a study done by researchers at the European Society of Cardiology. Apparently it causes the arteries to harden, putting your heart under strain and raising your blood pressure. Not only that, but there are chemicals in coffee that are linked to heart disease and strokes. Not even filtered coffee can stop that.
Which is why you should switch to tea. According to John Weisburger, Ph.D., tea can not only reduce the risk of heart disease, but also according to studies done by the University of Cambridge School of Medicine, it can strengthen bones and prevent against osteoporosis in women. And there's a chance that it may help to prevent cancer, as well. Oh yes, and studies have shown that compounds in black tea attach bacteria causing gum disease and cavities. In fact, they can even "suppress growth and acid production of cavity-causing bacteria in dental plaque."
Then again, if you've been drinking coffee all your life and are depressed by these facts, you'd better drink more coffee. Word has it that drinking coffee prevents suicide.
so overall tea is better but for some people coffee is better. it all depends
参考资料：||
most time they are both healthy .but i think tea is better.
Tea or coffee all right,they are not good or bad for
our healthy.
