If you can drink your friends under the table, you may have your genes to thank. Researchers at the University of California, San Francisco, have for the first time pinpointed a genetic mutation that determines your tolerance for booze. Specifically, those who have the so-called “happy hour” mutation produce a protein called epidermal growth factor, or EGF, which allows them to imbibe more alcohol than their peers before feeling its effects, such as falling asleep or getting just plain sloppy.
Of course, the “happy hour” gene comes at a cost: Experts say a high tolerance for booze predisposes a person to alcoholism. As such, scientists say that they might be able to both decrease alcohol tolerance and help treat alcoholism by deactivating the gene.