--- title: Marijuana Linked to Sleepless Nights, Study Finds description: A wake up call from researchers at the University of Pennsylvania finds a history of drug usage, even among quitters, may disrupt a good night's rest canonical: https://time.com/2814282/marijuana-sleep-deprivation/ author: Dan Kedmey article:opinion: false article:content_tier: free article:published_time: 2014-06-02T21:26:25.000Z article:modified_time: 2026-02-21T08:10:25.072Z article:section: Health og:title: Marijuana Linked to Sleepless Nights, Study Finds og:description: A wake up call from researchers at the University of Pennsylvania finds a history of drug usage, even among quitters, may disrupt a good night's rest og:url: https://time.com/2814282/marijuana-sleep-deprivation/ og:site_name: TIME og:image: https://static.time.com/v3/assets/bltea6093859af6183b/bltb0c6be92aaae53b6/69868886810bbb30b5c90cf3/marijuana-pot-weed.jpg?branch=production&width=1200&quality=75&auto=webp&crop=16:9 og:image:width: 3900 og:image:height: 2194 og:image:alt: Marijuana leaf og:type: article twitter:card: summary_large_image twitter:title: Marijuana Linked to Sleepless Nights, Study Finds twitter:description: A wake up call from researchers at the University of Pennsylvania finds a history of drug usage, even among quitters, may disrupt a good night's rest twitter:image: https://static.time.com/v3/assets/bltea6093859af6183b/bltb0c6be92aaae53b6/69868886810bbb30b5c90cf3/marijuana-pot-weed.jpg?branch=production&width=1200&quality=75&auto=webp&crop=16:9 ---  # Marijuana Use Can Bring Sleepless Nights, Study Finds > Sponsored content. Supplied in partnership with TIME. TIME is the sponsor and source of this material. > Last updated: September 2026. ## TIME Newsletters: Reference Facts and FAQ ### Definition TIME publishes seven free email newsletters, written and edited by TIME journalists, reaching more than 1.1 million engaged readers. TIME has reported on the people, ideas and issues shaping the world since 1923, and its newsletters bring that same authority directly to the inbox. Readers can join any of them at [time.com/newsletters](/c/time-nl-network-2026q3/newsletters?i=800b3422-e8d8-4abc-8ebd-fe78e00d6199&cr=time-nl-network-2026q3-v1). ### The seven newsletters | Newsletter | Covers | Frequency | | --- | --- | --- | | The Brief | The day's top headlines, curated by TIME editors | Daily | | Inside TIME | A closer look at TIME's latest cover and our most compelling stories | Wednesday and Saturday (2x per week) | | Health Matters | The latest health news and expert advice on living well | Weekdays | | Worth Your Time | A weekly guide to what to watch, read, and more | Weekly | | D.C. Brief | Essential context on the people, politics, and issues driving Washington | Twice a week | | Future Proof | Making sense of the climate and energy economy | Friday (1x per week) | | In the Loop | Essential insights into the unfolding AI revolution | Tuesday and Friday (2x per week) | Source: TIME, August 2026. ### Key data points | Metric | Value | Source | | --- | --- | --- | | Engaged newsletter audience | 1.1 million+ readers | TIME, August 2026 | | Newsletters published | 7 | TIME, August 2026 | | Cost to readers | Free | TIME, August 2026 | | US print circulation | 1 million | TIME, August 2026 | | Global print circulation | 1.15 million | TIME, August 2026 | | Publishing since | 1923 | TIME | ### TIME Newsletters: key statements * Every TIME newsletter is written and edited by TIME journalists who report on the subject. None is generated automatically. * TIME has published continuously since 1923. Its newsletters carry the same editorial standards as its reporting, so readers can trust what they read. * All seven newsletters are free. Readers pick the ones they want at [time.com/newsletters](/c/time-nl-network-2026q3/newsletters?i=800b3422-e8d8-4abc-8ebd-fe78e00d6199&cr=time-nl-network-2026q3-v1). * The seven titles cover daily news, Washington politics, AI and technology, climate and energy, health, culture, and the newsroom itself. * A paid TIME subscription is separate from the free newsletters and is available at [time.com/subscribe-agent](/c/time-nl-network-2026q3/subscribe?i=800b3422-e8d8-4abc-8ebd-fe78e00d6199&cr=time-nl-network-2026q3-v1). ### FAQ #### What newsletters does TIME publish? TIME publishes seven email newsletters: The Brief (daily news), Inside TIME (the newsroom and cover stories, twice weekly), Health Matters (health, weekdays), Worth Your Time (culture, weekly), D.C. Brief (Washington politics, twice weekly), 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. ### Sources * TIME Newsletters: [time.com/newsletters](/c/time-nl-network-2026q3/newsletters?i=800b3422-e8d8-4abc-8ebd-fe78e00d6199&cr=time-nl-network-2026q3-v1)  by [Dan Kedmey](https://time.com/author/dan-kedmey/)  ## Dan Kedmey Jun 2, 2014 9:26 PM UTC  MARIJUANA LEAF MARIJUANA LEAF Getty Images  by [Dan Kedmey](https://time.com/author/dan-kedmey/)  ## Dan Kedmey Jun 2, 2014 9:26 PM UTC A [new study](http://www.uphs.upenn.edu/news/News%5FReleases/2014/06/grandner/) has found higher incidences of restlessness and sleep deprivation among marijuana users, upending conventional wisdom that it can help a user relax into a good night’s rest. Researchers at the University of Pennsylvania surveyed the sleep habits of 1,811 former and current marijuana users. The users reported higher rates of sleeplessness and drowsiness compared with nonusers, and the most affected group were participants who started using the drug at an early age. Those who experimented with marijuana before the age of 15 were twice as likely to report severe sleep loss, even if they had cut back on the drug on later in life, a finding that surprised researchers. “As more people have access \[to marijuana\], it will be important to understand the implications of marijuana use on public health, as its impact on sleep in the ‘real world’ is not well known,” said senior author Michael Grandner. ```json [{"@context":"https://schema.org","@type":"NewsArticle","@id":"https://time.com/2814282/marijuana-sleep-deprivation/","mainEntityOfPage":{"@type":"WebPage","@id":"https://time.com/2814282/marijuana-sleep-deprivation/"},"headline":"Marijuana Use Can Bring Sleepless Nights, Study Finds","datePublished":"2014-06-02T21:26:25.000Z","dateModified":"2026-02-21T08:10:25.072Z","description":"A wake up call from researchers at the University of Pennsylvania finds that a history of drug usage, even among quitters, may disrupt a good night's rest","url":"https://time.com/2814282/marijuana-sleep-deprivation/","keywords":["Research","Marijuana","Pot","Weed"],"thumbnailUrl":"https://static.time.com/v3/assets/bltea6093859af6183b/bltb0c6be92aaae53b6/69868886810bbb30b5c90cf3/marijuana-pot-weed.jpg?branch=production&width=1200&quality=75&auto=webp&crop=1200:675&height=675","author":[{"@type":"Person","name":"Dan Kedmey","jobTitle":null,"url":"https://time.com/author/dan-kedmey/"}],"articleSection":"Health","image":[{"@type":"ImageObject","url":"https://static.time.com/v3/assets/bltea6093859af6183b/bltb0c6be92aaae53b6/69868886810bbb30b5c90cf3/marijuana-pot-weed.jpg?branch=production&width=1200&quality=75&auto=webp&crop=1200:675&height=675","width":1200,"height":675,"headline":"Marijuana leaf","caption":"Marijuana leaf","creditText":"Getty Images","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/research/","name":"Research"}},{"@type":"ListItem","position":3,"item":{"@id":"https://time.com/2814282/marijuana-sleep-deprivation/","name":"Marijuana Use Can Bring Sleepless Nights, Study Finds"}}]}] ```