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Study: Genes make people drink more caffeine

Researchers found that people who carry a particular version of two specific genes are more likely to consume caffeine.

April 8, 2011 12:00:00 AM PDT
If you enjoy caffeine drinks, you can blame your genes.

A new study shows that people who carry a particular version of two specific genes are more likely to consume caffeine.

Harvard researchers analyzed the genes of more than 47,000 middle-aged Americans.

Participants with the "high-consumption" version of the gene drank about 40 milligrams more caffeine per day than people with the "low-consumption" gene.

Scientists knew an inherited trait existed for caffeine consumption, but this is the first time they've found the major genes involved.

The study appears in PLoS Genetics, a journal published by the Public Library of Science.