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The next time you jump in a pool, think twice before you skip a trip to the bathroom. The chemical stew could harm more than just your reputation.

Scientists say peeing in pools is more than just socially frowned upon, it can be hazardous to your health.

It’s something that Olympic swimmers Ryan Lochte and Michael Phelps admit to doing, and it made for a funny scene in the movie “Grown Ups.”

We had UC Davis chemistry professor Matthew Augustine examine a study from Purdue and China Agricultural universities.

“I had not heard about it before, but it completely makes sense,” he said.