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Here's what happens if you never wash your jeans

Levi’s CEO Chip Bergh says we should stop washing our jeans because it’s good for the environment since it saves water and energy. “If you talk to real denim aficionados, they tell you don’t wash your blue jeans,” Bergh said in a 2014 interview at Fortune magazine’s Brainstorm Green conference. There is no evidence that not washing jeans is hazardous to your health, according to Bernhard Redl, an associate professor in the molecular biology department at the University of Innsbruck in Austria.