New Warning About Drinking Too Much Coffee

New study claims drinking more than four cups of coffee a day can increase risk of early death.
1:48 | 08/16/13

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Transcript for New Warning About Drinking Too Much Coffee
surprising headline for all of you possibly enjoying your morning coffee, myself included. A study says if you drink more than four cups a day, it might increase the risk of an early death. Senior medical contributor dr. Jennifer ashton is here to make sense of all of this. And a lot of people, they say, drink three or more cups a day. Should we be concerned about this new study? It's important to realize what this study brought up. We might be drinking more than we think. This could be equivalent to 2 1/2 cups. We might be way over that. To break down the study, we have to go through pros and cons. First of all, big study. They followed people for a long time and worked at various age groups. 40,000 people. Reputable. We like big numbers in medicine. Big negative here. This was a study based on observation. It did not show cause and effect. That's very, very important to keep in mind. It's also confusing because i feel, as a broadcaster, we've done stories that say, drink your coffee, there's medical benefits. One day, it's one thing. One day, it's another. More studies tip the scale in favor of caffeine. It may reduce the risk of certain types of cancer, like prostate cancer. Certain skin cancers. And a study out of harvard showed a reduced risk of suicide in people who drink coffee. All of that sounds really good. Just moderation is key? You got it. You hear doctors say that all the time. If you don't have heart problems, blood pressure problems. I will continue to drink my five cups a day, sister. Cheers. Great information from dr. Jennifer ashton. Drink them if you've got

This transcript has been automatically generated and may not be 100% accurate.

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