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"didn't know Gatorade helped prevent blood clots......that's pretty cool. How does it do that?"
Actually I'm not sure how it does that, but I read an article that the combination of electrolytes in Gatorade have been shown to help prevent blood clots in people who fly often more than plain water. Who knows whether it works or not, but when recovering from major surgery, it's better to be safe than sorry. Plus, the Gatorade will do him some good in recovering from his surgery. The first week is tough. And Gatorade isn't too bad for you!