Do You Have Caffeine Genes?

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Are you one of those people who can’t cope without a cup coffee? Blame your genes. According to a recent study, people who crave caffeine are more likely have two versions of two particular genes.

“It’s really an incredible story,” said Dr. Neil Caporaso, the study’s senior author. “People don’t suspect, but genetics plays a big role in a lot of behaviors, such as smoking and alcohol consumption. And now it turns out that it has a big part in how much caffeine we drink.”

Researchers from the Harvard School of Public Health arrived at this conclusion after examining the genes of more than 47,000 middle-aged Americans and quizzing the men and women about their caffeine habits, specifically the amount of chocolate, tea, soda, and chocolate they consume on a daily basis. The results?

People with two versions of the genes CYP1A2 and AHR consumed, on average, 40mg more caffeine per day than men and women without these genes. In case you’re wondering, 40mg of caffeine is roughly a can of soda or a third of a cup of coffee. The people who crave caffeine also appeared to tolerate it better than those without cravings.

“It turns out that your liver, more than your brain, determines daily caffeine intake,” said Dr. Caporaso. “You might think ‘drink caffeine to feel good, or not to feel bad,’ but that, in turn, is established by how fast your liver breaks down the caffeine. If your liver breaks it down very rapidly, then likely you drink more.”

I think I have this caffeine gene researchers describe. Do you?

Click here and here for more studies on the effects of caffeine.

Daily Mail

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