{"id":2496,"date":"2020-11-25T19:13:22","date_gmt":"2020-11-25T19:13:22","guid":{"rendered":"https:\/\/weedmaps.com\/learn\/?p=2496"},"modified":"2026-02-22T13:55:40","modified_gmt":"2026-02-22T13:55:40","slug":"does-smoking-weed-kill-brain-cells","status":"publish","type":"post","link":"https:\/\/weedmaps.com\/learn\/cannabis-and-your-body\/does-smoking-weed-kill-brain-cells","title":{"rendered":"Does smoking weed kill brain cells?"},"content":{"rendered":"<div id=\"bsf_rt_marker\"><\/div>\n<p>For more than a century, rumors have persisted about the supposed dangers of smoking marijuana. From the <a href=\"https:\/\/weedmaps.com\/learn\/cannabis-and-its-evolution\/war-on-drugs\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\" (opens in a new tab)\">War on Drugs<\/a> to cultural commentaries in film and media, smoking weed has often gotten a bad rap.<\/p>\n\n\n\n<p>Here we'll debunk the myths about smoking weed and dive into the research to discover whether cannabis use can kill brain cells.<\/p>\n\n\n\n<h2 class=\"wm-article-table-of-contents-header\" id=\"origins-of-the-myth-of-marijuana-killing-brain-cells\">\n\tOrigins of the myth of marijuana killing brain cells<\/h2>\n\n\n\n<p>The age of prohibition in the twentieth century coincided with some wild misconceptions about smoking weed and its effects on consumers. The two most prominent contributors to ongoing misconceptions about marijuana harming the brain are <em>Reefer Madness<\/em> and the fried egg campaign.&nbsp;<\/p>\n\n\n\n<p><strong>Reefer Madness<\/strong> is a 1936 film that experienced a resurgence in the 1970s and depicted excessively violent events linked to marijuana use. The melodramatic scenes show young adult cannabis smokers descending into various forms of madness and hallucinations until the dire advisory flashes on the screen at the end, \"TELL YOUR CHILDREN.\"<\/p>\n\n\n\t\t\t<figure class=\"wp-block-image \">\t\t\t<a href=\"https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2020\/08\/CRTV_1263_WMMW_Beauty-Shots_0189.jpg?ssl=1\" data-modal-open=\"lightbox_2019\">\n\t\t\t\t<img decoding=\"async\" src=\"https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2020\/08\/CRTV_1263_WMMW_Beauty-Shots_0189.jpg?fit=640%2C427&ssl=1\" srcset=\"https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2020\/08\/CRTV_1263_WMMW_Beauty-Shots_0189.jpg?w=1600&ssl=1 1600w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2020\/08\/CRTV_1263_WMMW_Beauty-Shots_0189.jpg?resize=300%2C200&ssl=1 300w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2020\/08\/CRTV_1263_WMMW_Beauty-Shots_0189.jpg?resize=1024%2C682&ssl=1 1024w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2020\/08\/CRTV_1263_WMMW_Beauty-Shots_0189.jpg?resize=768%2C512&ssl=1 768w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2020\/08\/CRTV_1263_WMMW_Beauty-Shots_0189.jpg?resize=1536%2C1023&ssl=1 1536w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2020\/08\/CRTV_1263_WMMW_Beauty-Shots_0189.jpg?w=1280&ssl=1 1280w\" sizes=\"(min-width: 768px) 476px, (min-width: 1218px) 772px, 100vw\" alt=\"reefer madness anti-marijuana propaganda weedmaps museum of weed\" title=\"Click to see a larger version of the image\">\n\t\t\t<\/a><cite>Photo by: Gina Coleman\/Weedmaps<\/cite><figcaption>Reefer Madness is a 1936 film that experienced a resurgence in the 1970s and depicted excessively violent events linked to marijuana use.<\/figcaption><\/figure>\t\t\t<div id=\"lightbox_2019\" data-modal data-modal-hide-heading data-modal-manual-close hidden>\n\t\t\t\t<h2>Image lightbox<\/h2>\n\t\t\t\t<img decoding=\"async\" src=\"https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2020\/08\/CRTV_1263_WMMW_Beauty-Shots_0189.jpg?fit=640%2C427&ssl=1\" srcset=\"https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2020\/08\/CRTV_1263_WMMW_Beauty-Shots_0189.jpg?w=1600&ssl=1 1600w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2020\/08\/CRTV_1263_WMMW_Beauty-Shots_0189.jpg?resize=300%2C200&ssl=1 300w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2020\/08\/CRTV_1263_WMMW_Beauty-Shots_0189.jpg?resize=1024%2C682&ssl=1 1024w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2020\/08\/CRTV_1263_WMMW_Beauty-Shots_0189.jpg?resize=768%2C512&ssl=1 768w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2020\/08\/CRTV_1263_WMMW_Beauty-Shots_0189.jpg?resize=1536%2C1023&ssl=1 1536w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2020\/08\/CRTV_1263_WMMW_Beauty-Shots_0189.jpg?w=1280&ssl=1 1280w\" sizes=\"100vw\" alt=\"reefer madness anti-marijuana propaganda weedmaps museum of weed\">\n\t\t\t\t<button role=\"button\" class=\"a11y-modal__close-btn\" data-modal-close-btn>\n\t\t\t\t\t<svg width=\"24\" height=\"24\" viewBox=\"0 0 24 24\" fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M13.414 12l4.293 4.293a1 1 0 01-1.414 1.414L12 13.414l-4.293 4.293a1 1 0 11-1.414-1.414L10.586 12 6.293 7.707a1 1 0 011.414-1.414L12 10.586l4.293-4.293a1 1 0 011.414 1.414L13.414 12z\"\/><\/svg>\n\t\t\t\t<\/button>\n\t\t\t<\/div>\n\n\n<p><strong>The fried egg<\/strong> campaign is one element of Reagan-era programs like DARE (Drug Abuse Resistance Education) that sought to educate children in the 1980s about the potential dangers of drugs. To this end, Partnership for a Drug-Free America (PDFA) sponsored a scare-tactic public service announcement with the image of an egg being dropped into a sizzling frying pan. In the background, a man gravely warned, \"This is your brain. This is your brain on drugs. Any questions?\" The first fried egg ad ran in 1987 and it was revived as recently as 2016.&nbsp;<\/p>\n\n\n\n<h2 class=\"wm-article-table-of-contents-header\" id=\"an-overview-of-the-research\">\n\tAn overview of the research<\/h2>\n\n\n\n<p>Dr. Adie Rae, neuroscientist and scientific adviser to Weedmaps, made the distinction between infrequent cannabis use and regular cannabis use, which may have very different effects on the brain. The available research supports the notion that occasional cannabis use may have neuroprotective effects on the brain, whereas the effects of frequent cannabis use are less clear but could be negative.<\/p>\n\n\n\n<p>Rae shared, \"The only evidence I could find in the literature of neurotoxicity to brain cells is caused by synthetic cannabinoids (such as Spice and K2). Plant-based cannabinoids appear to do the opposite, at least in the short term.\"<\/p>\n\n\n\n<h2 class=\"wm-article-table-of-contents-header\" id=\"studies-on-cannabis-use-and-brain-activity\">\n\tStudies on cannabis use and brain activity<\/h2>\n\n\n\n<p><a href=\"https:\/\/weedmaps.com\/learn\/dictionary\/cannabinoid\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\" (opens in a new tab)\">Many of the cannabinoids<\/a> in cannabis (especially CBD and CBG but THC as well) are actually neuroprotective, according to Rae. \"That means they turn on healthy cellular processes like antioxidation, rather than stimulating the cellular processes that lead to cell death. Being neuroprotective is what makes cannabis and its derivatives attractive targets as therapies for degenerative brain disorders like Parkinson's and Alzheimer's,\u201d she said.<\/p>\n\n\n\n<p>One 2020 literature review published in Molecular Neurobiology indicated that THC and CBD could potentially be therapeutic for <a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC7515854\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\" (opens in a new tab)\">individuals with Parkinson's and Alzheimer's disease<\/a>.<\/p>\n\n\n\n<p>A study performed on mice published in 2018 in Neurobiology of Aging showed that a very low dose of injected THC may trigger a <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/29107185\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\" (opens in a new tab)\">reversal of age-related cognitive impairments<\/a>. The positive effects lasted seven weeks.<\/p>\n\n\n\n<p>On the other hand, one study published in 2020 in the journal Addiction Biology showed that <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/33155343\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\" (opens in a new tab)\">the total size of the hippocampus<\/a>, which is important for memory and learning, continues to get smaller with more frequent cannabis use \u201cCannabis isn't necessarily 'killing' brain cells, but there is clearly something that is not normal in the hippocampus of chronic cannabis users,\u201d according to Rae.<\/p>\n\n\n\t\t\t<figure class=\"wp-block-image \">\t\t\t<a href=\"https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2019\/10\/CannabisInYourBody-22.jpg?ssl=1\" data-modal-open=\"lightbox_492\">\n\t\t\t\t<img decoding=\"async\" src=\"https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2019\/10\/CannabisInYourBody-22.jpg?fit=640%2C360&ssl=1\" srcset=\"https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2019\/10\/CannabisInYourBody-22.jpg?w=1600&ssl=1 1600w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2019\/10\/CannabisInYourBody-22.jpg?resize=300%2C169&ssl=1 300w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2019\/10\/CannabisInYourBody-22.jpg?resize=768%2C432&ssl=1 768w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2019\/10\/CannabisInYourBody-22.jpg?resize=1024%2C576&ssl=1 1024w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2019\/10\/CannabisInYourBody-22.jpg?w=1280&ssl=1 1280w\" sizes=\"(min-width: 768px) 476px, (min-width: 1218px) 772px, 100vw\" alt=\"Weed leaf on white colored brain\" title=\"Click to see a larger version of the image\">\n\t\t\t<\/a><cite>Photo by: Gina Coleman\/Weedmaps<\/cite><figcaption>While cannabis doesn't 'kill' brain cells, chronic cannabis use diminishes the production of key proteins that serve as survival tools for brain cells.<\/figcaption><\/figure>\t\t\t<div id=\"lightbox_492\" data-modal data-modal-hide-heading data-modal-manual-close hidden>\n\t\t\t\t<h2>Image lightbox<\/h2>\n\t\t\t\t<img decoding=\"async\" src=\"https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2019\/10\/CannabisInYourBody-22.jpg?fit=640%2C360&ssl=1\" srcset=\"https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2019\/10\/CannabisInYourBody-22.jpg?w=1600&ssl=1 1600w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2019\/10\/CannabisInYourBody-22.jpg?resize=300%2C169&ssl=1 300w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2019\/10\/CannabisInYourBody-22.jpg?resize=768%2C432&ssl=1 768w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2019\/10\/CannabisInYourBody-22.jpg?resize=1024%2C576&ssl=1 1024w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2019\/10\/CannabisInYourBody-22.jpg?w=1280&ssl=1 1280w\" sizes=\"100vw\" alt=\"Weed leaf on white colored brain\">\n\t\t\t\t<button role=\"button\" class=\"a11y-modal__close-btn\" data-modal-close-btn>\n\t\t\t\t\t<svg width=\"24\" height=\"24\" viewBox=\"0 0 24 24\" fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M13.414 12l4.293 4.293a1 1 0 01-1.414 1.414L12 13.414l-4.293 4.293a1 1 0 11-1.414-1.414L10.586 12 6.293 7.707a1 1 0 011.414-1.414L12 10.586l4.293-4.293a1 1 0 011.414 1.414L13.414 12z\"\/><\/svg>\n\t\t\t\t<\/button>\n\t\t\t<\/div>\n\n\n<p>In addition, some frequent cannabis users have reduced gray matter volume in several regions across the brain. Rae cited a 2020 study published in the scientific journal Neuroreport that demonstrated these <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/33044327\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\" (opens in a new tab)\">gray matter changes in heavy cannabis consumers<\/a>. \"Again, this doesn't mean that cannabis is 'killing' these brain cells, but the areas are smaller than normal,\" Rae said. \"Further, chronic cannabis use diminishes the production of key proteins that serve as survival tools for brain cells.\"<\/p>\n\n\n\n<h2 class=\"wm-article-table-of-contents-header\" id=\"how-to-consume-cannabis-the-smart-way\">\n\tHow to consume cannabis the smart way<\/h2>\n\n\n\n<p>Moderation is the best way to ensure that you can safely enjoy marijuana and possibly even derive some brain-protecting effects. Rather than consuming cannabis daily, consider reducing your consumption and setting aside <a href=\"https:\/\/weedmaps.com\/strains\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\" (opens in a new tab)\">your favorite strain<\/a> as a treat rather than a habit.<\/p>\n\n\n\n<p>Choosing low-THC strains that have fewer psychoactive properties may also be a smarter way to enjoy cannabis. Some popular low-THC strains include <a href=\"https:\/\/weedmaps.com\/strains\/ringo-s-gift\">Ringo's Gift<\/a>, Harlequin, Cannatonic, Pennywise, ACDC, and <a href=\"https:\/\/weedmaps.com\/strains\/sour-tsunami\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\" (opens in a new tab)\">Sour Tsunami<\/a>.<\/p>\n\n\n\n<p>Finally, experimenting with smoke-free cannabis consumption methods may be better for your brain (granted to potency is low) and will certainly be better for your lungs.<\/p>\n\n\n\n<h2 class=\"wm-article-table-of-contents-header\" id=\"bottom-line-on-weed-and-your-brain\">\n\tBottom line on weed and your brain<\/h2>\n\n\n\n<p>While studies have shown negative effects on the brains of frequent cannabis consumers, lower doses of THC may be beneficial.&nbsp;&nbsp;<\/p>\n\n\n\n<p>\u201cBecause the endocannabinoid system is so involved in all of our cognitive and homeostatic processes, it's wise to use cannabis moderately and\/or take regular breaks,\u201d Rae said. She recommends at least 48 hours of abstinence at least once a month.<\/p>\n\n\n\n<p>This advice, however, is for adult consumers, not those whose brains are still developing. \u201cThere are definitely developmental effects of cannabis on the developing brain, whether a person is in utero or in high school. The safest thing for brain health is to wait until the brain is fully developed, around age 22, before using cannabis,\" said Rae.<\/p>\n\n\n\n<p>It would seem that, when it comes to cannabis consumption and brain health, less truly is more.\u00a0<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><em>Major contributions from <a href=\"https:\/\/weedmaps.com\/learn\/subject-matter-expert\/apoe\" target=\"_blank\" rel=\"noreferrer noopener\">Dr. Adie Rae<\/a>.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>For more than a century, rumors have persisted about the supposed dangers of smoking marijuana. From the War on Drugs to cultural commentaries in film and media, smoking weed has often gotten a bad rap. Here we'll debunk the myths about smoking weed and dive...<\/p>\n","protected":false},"author":15,"featured_media":492,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[137],"tags":[426,592,654,731,732,733],"class_list":["post-2496","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cannabis-and-your-body","tag-cannabis-research","tag-smoking-cannabis","tag-thc-effects","tag-thc-and-the-brain","tag-cannabis-and-cognition","tag-brain-health"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Does Weed Kill Brain Cells? | Weedmaps<\/title>\n<meta name=\"description\" content=\"A brief overview of the latest scientific research on marijuana and brain cells.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/weedmaps.com\/learn\/cannabis-and-your-body\/does-smoking-weed-kill-brain-cells\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Does Weed Kill Brain Cells? 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