The Hidden Danger of Fish Oil Supplements - Men's Health

Three miles into the run, Jeremy Cornman, 33, felt some congestion in his lungs and wondered briefly if he’d caught a cold. It seemed unlikely. He was, after all, in paradise—Kona, Hawaii, to be specific—and until now, his 4th Ironman World Championships had been going largely according to plan.

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“While cross-training in the pool during a high-mileage phase of marathon training, I had an episode of SIPE, or swimming-induced pulmonary edema, myself,” says the study’s lead author, Charles C. Miller III, Ph.D., Professor and Chair of the Department of Biomedical Sciences at Texas Tech University Health Sciences Center.

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