A fan of black coffee and dark chocolate? It's in your genes, a new study says

From CNN | Health by Sandee LaMotte, CNN

Prefer your coffee black? Then you probably like dark, bitter chocolate, according to new research identifying a genetic basis for those preferences.

If that's you, then congratulations -- you are the lucky genetic winner of a trait that may offer you a boost toward good health, according to caffeine researcher Marilyn Cornelis, an associate professor of preventive medicine at Northwestern University Feinberg School of Medicine.

In prior research, Cornelis and her team discovered that a genetic variant may contribute to why some people enjoy numerous cups of coffee a day, while others do not.

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