# Insights on Cannabis and Tobacco Use Impact on Brain Volumes > **Author:** Benjamin Caplan, MD (ABFM Board Certified, MA Lic. #240562, NPI: 1962722637) > **Publisher:** CED Clinic (https://cedclinic.com) > **Canonical URL:** https://cedclinic.com/cannabis-tobacco-brain-volume-study/ > **Published:** 2026-03-27T10:05:51-04:00 | **Last Modified / Clinically Audited:** 2026-09-29T00:19:07-04:00 > **Clinical Summary:** Explore the cannabis tobacco brain volume study revealing associations with reduced brain volumes and implications for long-term safety and clinical care. --- ✦ New CED Clinical Relevance  #70Notable Clinical Interest  Emerging findings or policy developments worth monitoring closely. ⚒ Cannabis News  |  CED Clinic Neurology[Brain Health](https://cedclinic.com/cognitive-flexibility-alcohol-cocaine-misuse-effects/)Long-Term SafetyImagingPatient Counseling Why This Matters Neuroimaging studies linking [cannabis use](https://cedclinic.com/cannabis-cardiovascular-health-insights-2024/) to reduced brain volumes raise important questions about long-term safety, particularly for younger patients whose brains are still developing. These findings require careful interpretation alongside functional outcomes and dosing patterns to guide clinical recommendations. Clinical Summary Recent neuroimaging research suggests associations between [cannabis use](https://cedclinic.com/cannabis-cardiovascular-health-insights-2024/) and reduced brain volumes in certain regions, though the clinical significance of these structural changes remains unclear. The study methodology, population characteristics, and whether these represent causation versus correlation are critical factors in interpreting these findings. Without corresponding data on [cognitive function](https://cedclinic.com/reverse-cholesterol-transport-function-cannabis-users/), symptom improvement, or quality of life metrics, the practical implications for [patient care](https://cedclinic.com/cannabis-cardiovascular-risk-impact/) remain uncertain. Dr. Caplan’s Take “I see these structural imaging findings regularly in clinical practice, but they don’t tell us what matters most—whether patients are functioning better or worse. The key question isn’t whether brain scans look different, but whether people are thinking, sleeping, and living better.” Clinical Perspective 🧠 Clinicians should discuss these findings with patients using cannabis therapeutically while emphasizing that structural changes don’t necessarily correlate with functional impairment. Consider baseline cognitive assessments for long-term users and monitor functional outcomes more closely than imaging findings. Age at initiation and dosing patterns likely matter more than simple use versus non-use comparisons. 💬 Join the Conversation Have a question about how this applies to your situation? [Ask Dr. Caplan →](https://benjamincaplan.com/ask-dr-caplan) Want to discuss this topic with other patients and caregivers? [Join the forum discussion →](https://cedclinic.com/interact/discussion-forums/forum/cannabis-industry/) Have thoughts on this? Share it: [𝕏 Share on X](https://twitter.com/intent/tweet?text=Just%20read%20this%20on%20CEDclinic.com%3A%20Cannabis%20and%20Tobacco%20Use%20Tied%20to%20Reduced%20Brain%20Volumes%20-%20Medscape%20%40drcaplan&url=https%3A//www.medscape.com/viewarticle/cannabis-and-tobacco-use-tied-reduced-brain-volumes-2026a100094a)[in Share on LinkedIn](https://www.linkedin.com/sharing/share-offsite/?url=https%3A//www.medscape.com/viewarticle/cannabis-and-tobacco-use-tied-reduced-brain-volumes-2026a100094a)[🦥 Share on BlueSky](https://bsky.app/intent/compose?text=Just%20read%20this%3A%20Cannabis%20and%20Tobacco%20Use%20Tied%20to%20Reduced%20Brain%20Volumes%20-%20Medscape%20--%20via%20%40drcaplan.bsky.social%20https%3A//www.medscape.com/viewarticle/cannabis-and-tobacco-use-tied-reduced-brain-volumes-2026a100094a)[📷 Follow on Instagram](https://www.instagram.com/drbenjamincaplan/)[📝 Read more on Substack](https://substack.com/@doctorapproved)[🔔 Subscribe via RSS](https://cedclinic.com/category/cannabis-news/feed/) 📰 Source: [https://www.medscape.com/viewarticle/cannabis-and-tobacco-use-tied-reduced-brain-volumes-2026a100094a](https://www.medscape.com/viewarticle/cannabis-and-tobacco-use-tied-reduced-brain-volumes-2026a100094a) Table of Contents - [FAQ](#FAQ)[What is the clinical relevance level of this cannabis research?](#What_is_the_clinical_relevance_level_of_this_cannabis_research) - [What medical areas does this cannabis research focus on?](#What_medical_areas_does_this_cannabis_research_focus_on) - [Does this research address long-term safety concerns?](#Does_this_research_address_long-term_safety_concerns) - [What type of medical imaging is involved in this study?](#What_type_of_medical_imaging_is_involved_in_this_study) - [Why should clinicians pay attention to this cannabis research?](#Why_should_clinicians_pay_attention_to_this_cannabis_research) - [Related](#Related) ## FAQ #### What is the clinical relevance level of this cannabis research? This study has been assigned a Clinical Relevance rating of #70, indicating “Notable Clinical Interest.” This means the findings represent emerging developments or policy changes that healthcare providers should monitor closely. #### What medical areas does this cannabis research focus on? The research covers multiple key areas including neurology, [brain health](https://cedclinic.com/cognitive-flexibility-alcohol-cocaine-misuse-effects/), and medical imaging. The study appears to examine cannabis effects on neurological function and brain-related conditions. #### Does this research address long-term safety concerns? Yes, long-term safety is specifically highlighted as one of the research focus areas. This suggests the study examines potential risks or benefits of extended cannabis use over time. #### What type of medical imaging is involved in this study? While the specific imaging modality isn’t detailed in the summary, the research incorporates medical imaging techniques to assess brain health and neurological effects. This likely involves brain scans to measure structural or functional changes. #### Why should clinicians pay attention to this cannabis research? This research represents emerging findings in [cannabis medicine](https://cedclinic.com/essential-oils-industrial-hemp-antimicrobial-benefits/) that could influence clinical practice or policy decisions. The “Notable Clinical Interest” rating suggests the results may have practical implications for [patient care](https://cedclinic.com/cannabis-cardiovascular-risk-impact/) and treatment protocols. {“@context”: “https://schema.org”, “@type”: “NewsArticle”, “headline”: “Cannabis and Tobacco Use Tied to Reduced Brain Volumes – Medscape”, “url”: “https://www.medscape.com/viewarticle/cannabis-and-tobacco-use-tied-reduced-brain-volumes-2026a100094a”, “datePublished”: “2026-03-27T12:37:57Z”, “about”: “cannabis tobacco use tied reduced brain”} [https://cedclinic.com/contact/](https://cedclinic.com/contact/) Physician-Led, Whole-Person Care A doctor who takes the time to truly understand you. Personal care that starts with listening and is guided by experience and ingenuity. Health, Longevity, Wellness One-on-One Cannabis Guidance Metabolic Balance [Leave a Message](https://cedclinic.com/contact/) [Metabolic Care](https://cedclinic.com/metabolic/metabolic-how-it-works/) [Medical Consulting](https://cedclinic.com/book/) [Cannabis Care](https://cedclinic.com/book/) [https://cedclinic.com/contact/](https://cedclinic.com/contact/) RELATED READING AT CED CLINIC Continue exploring the evidence New research suggests cannabis and tobacco use may be linked to brain shrinkage … – Instagram Explore new findings on how cannabis and tobacco use might be associated with brain shrinkage and what this means for users. Read More [Smoking weed and tobacco actually shrink your brain — here are the parts at risk](https://cedclinic.com/smoking-shrinks-key-brain-regions-cannabis-tobacco-effects/) Detailed analysis of brain regions affected by smoking weed and tobacco, highlighting areas most vulnerable to volume reduction. [Learn More](https://cedclinic.com/smoking-shrinks-key-brain-regions-cannabis-tobacco-effects/) Long-term cannabis use may physically change structure of brain – The Times Investigate how long-term cannabis use could alter brain structure and the potential clinical consequences of these changes. Discover Insights ### Related --- ### Verification & Medical Governance - **Lead Clinical Author:** Benjamin Caplan, MD - **Credentials:** Board Certified in Family Medicine (ABFM), Founder & CMO CED Clinic & CED Foundation, Author of *The Doctor-Approved Cannabis Handbook* (Penguin Random House). - **Clinical Scale:** 350,000+ lifetime evaluations overseen; 81,008-patient Real-World Evidence Registry (`~/.ced_rwe_vault.db`); 125,000+ peer-reviewed study literature observatory (`http://localhost:8768/api/explorer/terminal`). - **License Verification:** Commonwealth of Massachusetts License #240562 (https://checkahealthlicense.mass.gov/). - **NPI Registry:** 1962722637 (https://npiregistry.cms.hhs.gov/provider-view/1962722637). - **Ethics & Data Privacy:** Clinical registry observations adhere strictly to HIPAA Safe Harbor de-identification (45 CFR § 164.514(b)) and criteria for secondary research exemption under 45 CFR § 46.104(d)(4).