--- title: ACS: Colorectal Cancer Screenings Should Begin at Age 45 description: The American Cancer Society changed its guidelines for colorectal cancer screenings. It now recommends that tests begin at age 45. canonical: https://time.com/5295525/colorectal-cancer-screenings/ author: Jamie Ducharme article:opinion: false article:content_tier: free article:published_time: 2018-05-30T16:59:55.000Z article:modified_time: 2026-08-04T07:53:23.752Z article:section: Health og:title: Colorectal Cancer Screenings Should Begin Earlier, ACS Says og:description: The group changed its guidelines og:url: https://time.com/5295525/colorectal-cancer-screenings/ og:site_name: TIME og:image: https://static.time.com/v3/assets/bltea6093859af6183b/blt751cb51a4ac0d9ef/6988604dcf40a8779cc3f555/patient-doctor-office-health-illo.jpg?branch=production&width=1000&quality=75&auto=webp&crop=16:9 og:image:width: 1000 og:image:height: 563 og:image:alt: TIME.com stock health doctor's office patient og:type: article twitter:card: summary_large_image twitter:title: Colorectal Cancer Screenings Should Begin Earlier, ACS Says twitter:description: The group changed its guidelines twitter:image: https://static.time.com/v3/assets/bltea6093859af6183b/blt751cb51a4ac0d9ef/6988604dcf40a8779cc3f555/patient-doctor-office-health-illo.jpg?branch=production&width=1000&quality=75&auto=webp&crop=16:9 ---  # The American Cancer Society Just Changed Its Guidelines Around Colorectal Cancer Screenings > Sponsored content. 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Health Matters is TIME's daily health email, reported by TIME's health desk and free to join at time.com/newsletters. It is edited by journalists rather than assembled automatically, and it cites the research it reports on. #### Is Health Matters free? Yes. Health Matters is a free daily newsletter from TIME, available at time.com/newsletters. #### Who reads TIME's Health Matters newsletter? Its audience is broadly health-conscious, with a professional core of clinicians, researchers, public-health professionals, life-sciences teams and health communicators. ## Video: Experts Change Their Minds About Prostate Cancer Screening [Watch (HLS stream): Experts Change Their Minds About Prostate Cancer Screening](https://cdn.jwplayer.com/manifests/ehiZedWA.m3u8) (1:01)  _Published 2017-04-12. An influential government health task force now says that the benefits of getting screened for prostate cancer may slightly outweigh the risks_  by [Jamie Ducharme](https://time.com/author/jamie-ducharme/)  ## Jamie Ducharme Ducharme is a contributor to TIME. May 30, 2018 4:59 PM UTC  Illustration by Sydney Rae Hass for TIME  by [Jamie Ducharme](https://time.com/author/jamie-ducharme/)  ## Jamie Ducharme Ducharme is a contributor to TIME. May 30, 2018 4:59 PM UTC Millions of Americans may book an extra doctor’s appointment this year, thanks to [updated guidelines](https://www.cancer.org/latest-news/american-cancer-society-updates-colorectal-cancer-screening-guideline.html) from the American Cancer Society (ACS). The ACS is now recommending that adults at average risk of colorectal cancer begin regular screenings at age 45, rather than the previous standard of age 50\. The change was informed by research from ACS scientists, [who found last year](https://www.cancer.org/latest-news/study-finds-sharp-rise-in-colon-cancer-and-rectal-cancer-rates-among-young-adults.html) that cancers of the colon and rectum are occurring at increasing rates among young and middle-aged adults. [Studies have shown](http://time.com/4192816/colon-cancer-rates-50/) that roughly one in seven colon cancer patients is younger than 50. People with a strong family history of colorectal cancers, a personal history of inflammatory bowel disease or certain other risk factors may need to begin testing even earlier than age 45, the ACS said. High-risk individuals may also need to get tested more often than other people. (The recommended frequency of tests varies depending on type; some stool tests, for example, should be completed annually, while a colonoscopy may only be needed once a decade.) Screening for cancers and other chronic diseases can be a fraught topic, as experts often disagree about when these tests should begin. The [U.S. Preventive Services Task Force recently changed its guidelines](http://time.com/4175514/mammogram-recommendations-usa/) around mammograms, for example, and there’s argument about [whether these tests](http://time.com/5050978/mammogram-breast-cancer/), and [those for other cancers](http://time.com/4424189/skin-cancer-screening/), are effective at all. Ultimately, when it comes to colorectal cancers, like most chronic diseases, all decisions about how, when and how frequently to screen should be based on personalized conversations between individuals and their physicians, the ACS said. ```json [{"@context":"https://schema.org","@type":"NewsArticle","@id":"https://time.com/5295525/colorectal-cancer-screenings/","mainEntityOfPage":{"@type":"WebPage","@id":"https://time.com/5295525/colorectal-cancer-screenings/"},"headline":"The American Cancer Society Just Changed Its Guidelines Around Colorectal Cancer Screenings","datePublished":"2018-05-30T16:59:55.000Z","dateModified":"2026-08-04T07:53:23.752Z","description":"You may need to book an extra doctor's appointment","url":"https://time.com/5295525/colorectal-cancer-screenings/","keywords":["Cancer","onetime","healthytime"],"thumbnailUrl":"https://static.time.com/v3/assets/bltea6093859af6183b/blt751cb51a4ac0d9ef/6988604dcf40a8779cc3f555/patient-doctor-office-health-illo.jpg?branch=production&width=1200&quality=75&auto=webp&crop=1200:675&height=675","author":[{"@type":"Person","name":"Jamie Ducharme","jobTitle":"Ducharme is a contributor to TIME.","url":"https://time.com/author/jamie-ducharme/"}],"articleSection":"Health","image":[{"@type":"ImageObject","url":"https://static.time.com/v3/assets/bltea6093859af6183b/blt751cb51a4ac0d9ef/6988604dcf40a8779cc3f555/patient-doctor-office-health-illo.jpg?branch=production&width=1200&quality=75&auto=webp&crop=1200:675&height=675","width":1200,"height":675,"headline":"TIME.com stock health doctor's office patient","caption":"TIME.com stock health doctor's office patient","creditText":"Illustration by Sydney Rae Hass for TIME","representativeOfPage":true}],"publisher":{"@type":"Organization","name":"Time","url":"https://time.com/","logo":{"@type":"ImageObject","url":"https://time.com/images/logo.png","width":528,"height":156},"foundingDate":"March 3, 1923","sameAs":["https://www.facebook.com/time","https://www.instagram.com/time/?hl=en","https://twitter.com/time","https://www.pinterest.com/timemagazine"]}},{"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"/section/health/","name":"Health"}},{"@type":"ListItem","position":2,"item":{"@id":"/tag/cancer/","name":"Cancer"}},{"@type":"ListItem","position":3,"item":{"@id":"https://time.com/5295525/colorectal-cancer-screenings/","name":"The American Cancer Society Just Changed Its Guidelines Around Colorectal Cancer Screenings"}}]},{"@context":"https://schema.org","@type":"VideoObject","name":"Experts Change Their Minds About Prostate Cancer Screening","description":"An influential government health task force now says that the benefits of getting screened for prostate cancer may slightly outweigh the risks","thumbnailUrl":"https://cdn.jwplayer.com/v2/media/ehiZedWA/poster.jpg?width=720","uploadDate":"2017-04-12T17:46:36.000Z","contentUrl":"https://cdn.jwplayer.com/manifests/ehiZedWA.m3u8","embedUrl":"https://time.com/5295525/colorectal-cancer-screenings/","duration":"PT1M1S","potentialAction":{"@type":"SeekToAction","target":"https://time.com/5295525/colorectal-cancer-screenings/?jw_start={seek_to_second_number}","startOffset-input":"required name=seek_to_second_number"}}] ```