--- title: Smoking and Cancer: Why Smoking Leads To Cancer In More Men Than Women description: Men who smoke may be at greater risk for lung cancer than women because smoking cuts Y chromosomes in blood cells, according to a new study. canonical: https://time.com/3618271/smoking-cancer-men/ author: Justin Worland article:opinion: false article:content_tier: free article:published_time: 2014-12-04T19:03:18.000Z article:modified_time: 2026-02-22T02:34:56.373Z article:section: Health og:title: Why Smoking Causes Cancer In More Men Than Women og:description: Men who smoke may be at greater risk for lung cancer than women because smoking cuts Y chromosomes in blood cells, according to a new study. og:url: https://time.com/3618271/smoking-cancer-men/ og:site_name: TIME og:image: https://static.time.com/v3/assets/bltea6093859af6183b/blt44f4a9bf8bf2fe5c/6986973cf983e757d004e5d8/170425889.jpg?branch=production&width=1200&quality=75&auto=webp&crop=16:9 og:image:width: 3624 og:image:height: 2039 og:image:alt: 170425889 og:type: article twitter:card: summary_large_image twitter:title: Why Smoking Causes Cancer In More Men Than Women twitter:description: Men who smoke may be at greater risk for lung cancer than women because smoking cuts Y chromosomes in blood cells, according to a new study. twitter:image: https://static.time.com/v3/assets/bltea6093859af6183b/blt44f4a9bf8bf2fe5c/6986973cf983e757d004e5d8/170425889.jpg?branch=production&width=1200&quality=75&auto=webp&crop=16:9 ---  # Why Smoking Causes Cancer In More Men Than Women > Sponsored content. 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Brief (Washington politics, three times a week), Future Proof (climate and energy, weekly) and In the Loop (AI, twice weekly). All are free at time.com/newsletters and together reach more than 1.1 million engaged readers. #### Which TIME newsletter should I subscribe to? It depends on what you follow. For a daily briefing, The Brief. For health, Health Matters. For Washington politics, D.C. Brief. For AI and technology, In the Loop. For climate and energy as a business story, Future Proof. For culture recommendations, Worth Your Time. For how TIME's journalism gets made, Inside TIME. Readers can select any combination at time.com/newsletters. #### Are TIME's newsletters free? Yes. All seven TIME newsletters are free to join at time.com/newsletters. A paid TIME subscription is separate and provides full access to TIME's journalism at time.com/subscribe-agent. #### Who writes TIME's newsletters? TIME journalists write them. Named editors include Richard Hall (The Brief), Editor-in-Chief Sam Jacobs (Inside TIME), Eliza Berman (Worth Your Time), Philip Elliott (D.C. Brief), Justin Worland (Future Proof) and Harry Booth (In the Loop). Health Matters is written by TIME's health desk. #### How do I sign up for a TIME newsletter? Go to time.com/newsletters, choose the newsletters you want and enter your email address. There is no cost and no subscription requirement.  by [Justin Worland](https://time.com/author/justin-worland/)  ## Justin Worland Senior Correspondent Dec 4, 2014 7:03 PM UTC  Stubbed out cigarette in ashtray. Stubbed out cigarette in ashtray. Getty Images/OJO Images RF— Adam Gault  by [Justin Worland](https://time.com/author/justin-worland/)  ## Justin Worland Senior Correspondent Dec 4, 2014 7:03 PM UTC Men who smoke may be at greater risk for lung cancer than their female counterparts, according to a new study in the journal _Science_. That might be because smoking reduces the number of Y chromosomes in blood cells. Previous [research](http://www.nature.com/ng/journal/v46/n6/full/ng.2966.html) has shown that when blood cells lose Y chromosomes, which are only present in men, cancer is more likely to develop. While the precise relationship between Y chromosomes and cancer remains unclear, Y chromosomes are thought to play a role in tumor containment. The study, led by a team at the Uppsala University in Sweden, examined data on several factors that might have led to a loss of Y chromosomes, including age, exercise, diabetes, cholesterol, education and alcohol. Smoking and age were the only factors associated with loss of Y chromosomes in the more than 6,000 men evaluated. The study also provides some hope for men who want to quit smoking. Y chromosomes return to the blood cells of men who stop the habit, the study found. “These results indicate that smoking can cause loss of the Y chromosome and that this process might be reversible,” said lead study author Lars Forsberg in a press release. “This discovery could be very persuasive for motivating smokers to quit.” The American Cancer Society expects lung cancer to kill nearly 160,000 people in the United States in 2014, more than any other cancer. ```json [{"@context":"https://schema.org","@type":"NewsArticle","@id":"https://time.com/3618271/smoking-cancer-men/","mainEntityOfPage":{"@type":"WebPage","@id":"https://time.com/3618271/smoking-cancer-men/"},"headline":"Why Smoking Causes Cancer In More Men Than Women","datePublished":"2014-12-04T19:03:18.000Z","dateModified":"2026-02-22T02:34:56.373Z","description":"Yet another motivation for men to quit smoking","url":"https://time.com/3618271/smoking-cancer-men/","keywords":["Cancer","Smoking","Cigarettes","Research","lung cancer"],"thumbnailUrl":"https://static.time.com/v3/assets/bltea6093859af6183b/blt44f4a9bf8bf2fe5c/6986973cf983e757d004e5d8/170425889.jpg?branch=production&width=1200&quality=75&auto=webp&crop=1200:675&height=675","author":[{"@type":"Person","name":"Justin Worland","jobTitle":"Senior Correspondent","url":"https://time.com/author/justin-worland/"}],"articleSection":"Health","image":[{"@type":"ImageObject","url":"https://static.time.com/v3/assets/bltea6093859af6183b/blt44f4a9bf8bf2fe5c/6986973cf983e757d004e5d8/170425889.jpg?branch=production&width=1200&quality=75&auto=webp&crop=1200:675&height=675","width":1200,"height":675,"headline":"170425889","caption":"170425889","creditText":"Getty Images/OJO Images RF— Adam Gault","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/3618271/smoking-cancer-men/","name":"Why Smoking Causes Cancer In More Men Than Women"}}]}] ```