To promote the importance of cancer screening, Ryan Reynolds documents his "life-saving" colonoscopy. 

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On Instagram, Ryan Reynolds shared a video of his colonoscopy. 

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After having his first colonoscopy, the actor recently discovered he had a polyp on his colon.  

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Ryan filmed the entire process of getting the test in order to raise awareness about the cancer screening process.

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What began as a wager between Ryan and Rob McElhenney, the co-chairman of his Welsh football team Wrexham AFC, ended up being a "life-saving" opportunity for the actor,  

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who was asked to record and post a video of his colonoscopy online after losing the wager with Rob.  

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We want this potentially life-saving procedure to be less mysterious and stigmatised, Ryan continued in his post. 

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Many of Reynolds' friends and fans left encouraging comments on the post he shared. 

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