Coffee Study Shows It May Reduce Melanoma Risk

Having the dark brew may help prevent the most dangerous kind of skin cancer.
1:49 | 01/21/15

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Transcript for Coffee Study Shows It May Reduce Melanoma Risk
To you to the hidden health benefits of coffee. A new study revealing it may reduce your risk of getting the most dangerous kind of skin cancer. ABC's doctor Jennifer Ashton is here with what you need to know. You know a lot of people are picking up their coffee right now. Are you guys fan? I'm not a fan but what are the main findings? This was a big study out of Yale and looked the half a million people by questionnaire and found those who drank the most coffee had the lowest Rick of skin cancer and they went down with every cup they drank a day. Those who drank four or more cups a day like I do cut their risk by 20%. It's not all in the same hour, robin. Don't worry. You looked scared. It's spread out. So should people start drinking more coffee? Well, look, we have to remember cav peen is a drug and can be side effects and Rinks and can increase heart rate, cause dehydration, lead to insomnia but the benefits have been well documented. Also can lower the risk not just of skin cancer, basal cell but certain types of uterine cancer and be protective to the brain so more in the net positive column. Can they explain why? They can't and this is the thing. This was done by an association but that's the first step in medicine. If we see an association we ask is it real or not and if it's real, which this one appears to be, is it causal? Are there other factors that contribute to this? For now continue the sunscreen but enjoy your coffee. Cheers, my friend. Four cups. Spread out, though. Everybody can get in on the act. Ask Dr. Jen your questions throughout the morning. Tweet her at Dr. J. Ashton. "Pop news" and weather

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

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