MINNEAPOLIS (WCCO) – If it takes you several cups of coffee to get going in the morning, it could be genetic.

A Harvard researcher polled 120,00 people on their coffee drinking habits, then scanned their DNA.

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She said she found six new gene variations that determine how people react to coffee.

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They could explain why some people are good to go with just one cup of coffee, while others need two or three cups.

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According to the study, the new genes explain about 1.3 percent of our coffee-drinking behavior.