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His drive as an athlete to be the best became a drive “to drink the most alcohol, smoke the most and do the most drugs. “I made some bad decisions,” he admits.

“The results of our study add to existing research suggesting that our drive to drink coffee may be embedded in our genes,” first author Nicola Pirastu, a genetics researcher at the University of Edinburgh in Scotland, said in a statement.

"The results of our study add to existing research suggesting that our drive to drink coffee may be embedded in our genes," said study author Nicola Pirastu.

The energy drink’s sugary additives may also have been a significant factor in increasing the drive to drink more.

He found that he was able to predict when his drive to drink would return, since it always tended to surface right after that old, unbearable pressure to perform.