Ryan Reynolds is spreading the gospel of colonoscopies after he had polyps removed during a preventive screening. Together with pal and co-Wrexham A.F.C. chair Rob McElhenney, the “Deadpool” actor underwent the procedure and shared the results in a new video from Lead from Behind, which raises awareness for colon cancer. “Part of being this age is getting a colonoscopy. It’s a simple step that could literally, and I mean literally, save your life,” said Reynolds in the video, also made in association with the Colorectal Cancer Alliance. Reynolds is informed afterwards by NYU Langone Health’s D…