Over the past 12 months, hundreds of peer-reviewed cannabis-related studies have been released, covering everything from pain management and neurological conditions to cancer biology, metabolic health, infectious disease, and psychological outcomes.
From human clinical trials to rigorous preclinical work, this body of research highlights both therapeutic potential and areas needing further study, and also covers some studies related to cannabis cultivation and policy.
With that in mind, bellow’s a breakdown of over 500 peer-reviewed cannabis studies published over the past 12 months.
Cannabis Extract Triggered Cell Death and Reduced Invasion in Human Breast Cancer Cells
A lab study found that a full-spectrum cannabis extract induced apoptosis and decreased invasive behavior in human breast cancer cell lines, suggesting potential anticancer activity worth further investigation.
Cannabis-Based Medicines Linked to Long-Term Quality-of-Life Improvements in Multiple Sclerosis Patients
A real-world study of 203 people with multiple sclerosis found sustained improvements in energy, physical function, pain, sleep, and overall health for up to two years after starting cannabis-based medicinal products. Benefits remained statistically significant over time, and most adverse effects were mild.
Rare Varin Cannabinoids Show Potent Anticancer Activity in Lab Tests
Lab research found that rare varin cannabinoids significantly reduced the viability and growth of several human tumor cell lines in vitro. The findings suggest these lesser-known cannabinoids may warrant further investigation as potential antitumor agents.
Germany Marijuana Legalization Hasn’t Increased Driving While High
Traffic safety data from Germany show that marijuana legalization has not led to a rise in driving under the influence of cannabis. Comparisons before and after policy change suggest stable rates of detected THC impairment among drivers.
Clinical Trial Finds Cannabis Oil Matches Lorazepam for Treating Insomnia, Improves Quality of Life
In a randomized clinical trial, cannabis oil performed similarly to lorazepam in reducing insomnia symptoms and was associated with quality-of-life improvements. Side effects were comparable between groups, suggesting cannabis oil as a potential alternative sleep aid.
Marijuana Use Linked to Reduced Opioid Use and Overdose Deaths
A population study found that higher cannabis availability and use were associated with lower prescription opioid use and declines in opioid overdose mortality, supporting evidence that marijuana can help reduce reliance on opioids.
CBD Protects Newborn Brain Cells From Oxygen Deprivation by Blocking Ferroptosis Pathway
In a newborn animal model, CBD reduced neuronal death caused by oxygen deprivation by inhibiting the ferroptosis cell-death pathway, indicating a potential mechanism for neuroprotection in perinatal injury.
Medical Cannabis Linked to Reduced Depression and Anxiety Symptoms in Patients
An observational study found that patients using medical cannabis for mood disorders reported reductions in symptoms of depression and anxiety over time, with many noting improved daily functioning and quality of life.
CBD and CBG Dose Shows Promise for Seizure Reduction
A dosing study reported that a combined CBD and cannabigerol (CBG) regimen reduced seizure frequency in an animal model more effectively than either cannabinoid alone, suggesting synergistic anticonvulsant effects.
Full Spectrum CBD Extract Reduced Meth-Relapse-Like Behavior Better Than CBD Alone
In an animal model of methamphetamine relapse, a full-spectrum CBD extract was more effective at reducing drug-seeking behaviors after abstinence than isolated CBD, pointing to possible benefits of whole-plant cannabinoid profiles.
CBD Gel May Aid Jaw Pain and Inflammation
A study found that a topical CBD gel reduced jaw pain and inflammation in participants with temporomandibular discomfort, pointing to potential non-systemic treatment options for TMJ-related symptoms.
Randomized Controlled Trial Finds CBD May Reduce Anxiety and Perceived Effort in Runners
A randomized trial showed that CBD lowered self-reported anxiety and perceived exertion during running compared with placebo, indicating potential benefits for exercise performance and psychological comfort.
CBD Reduces Inflammatory Lipid Build-Up in Visceral Fat Linked to Obesity
A preclinical study found that CBD lowered inflammatory lipid accumulation in visceral fat tissue in an obesity model, suggesting anti-inflammatory effects that could help address metabolic dysfunction tied to excess abdominal fat.
THC Shown to Disrupt Cavity-Causing Bacteria and Dental Biofilms
Lab research reported that THC significantly disrupted Streptococcus mutans growth and biofilm formation, indicating potential antimicrobial effects against cavity-causing dental bacteria.
Cannabinoids Like CBD and THC May Influence Liver Cancer Pathways Through Ion Channels
Researchers found that CBD and THC modulated ion channels involved in liver cancer cell signaling in vitro, which altered cancer-related pathways and suggests a mechanistic role worth further exploration.
Veterans Report Marijuana Use Linked to VA Health Outcomes
A survey of veterans receiving care through the VA found many reported using marijuana for pain, PTSD, or sleep, with varied impacts on symptom relief and healthcare use patterns, highlighting the role cannabis plays in this population.
Cannabinoids and Stroke: New Findings on Neuroprotection and Recovery
Emerging research suggests certain cannabinoids may offer neuroprotective benefits following stroke by reducing inflammation and supporting cellular survival pathways in experimental models, though clinical data remain limited.
CBC and THC Show Anticancer Activity in Lab Tests
Lab research found that a combination of cannabichromene (CBC) and THC reduced viability and invasiveness in several human cancer cell lines, indicating potential synergistic anticancer effects to explore in future studies.
CBD May Help Overcome Drug Resistance in Leukemia Cells
Researchers found that CBD sensitized drug-resistant leukemia cells to chemotherapy in vitro by modulating key resistance pathways, pointing to CBD’s potential use in overcoming treatment resistance.
CBD Shows Potent Antibacterial Activity Against Drug-Resistant Enterococcus Strains
A lab study found that CBD exhibited strong antibacterial effects against drug-resistant Enterococcus strains, including those resistant to common antibiotics, suggesting CBD’s potential as an alternative antimicrobial agent pending further research.
Hemp Seed Extracts May Enhance Effectiveness of Antibiotics and Antifungal Medications
Researchers reported that hemp seed extracts boosted the activity of several antibiotics and antifungals in vitro, indicating the extracts could help strengthen conventional antimicrobial therapies.
Low-Dose CBD Protected Developing Heart From Oxygen-Related Injury in Newborn Animal Study
In a newborn animal model, low-dose CBD reduced cardiac cell damage from oxygen-related injury, suggesting CBD’s protective effects on the developing heart.
CBD Reduced Bladder Pain and Inflammation in an Animal Model of Interstitial Cystitis
In an animal model of interstitial cystitis, CBD treatment lowered pain responses and markers of bladder inflammation, indicating possible therapeutic relevance for painful urinary conditions pending human research.
CBD Reduces Bacteria That Causes Gum Disease, Finds New Lab Study
A laboratory study reported that CBD significantly decreased populations of Porphyromonas gingivalis, a key pathogen in gum disease, pointing to potential antimicrobial benefits for oral health applications.
Young Adults Say Marijuana Enhances Pleasure, Connection, and Confidence During Sex
A survey of young adults found that many users reported higher levels of pleasure, emotional connection, and confidence during sexual activity when using marijuana, highlighting perceived psychosocial benefits for some individuals.
THC Alzheimer’s Clinical Trial Shows Cognitive Gains
A phase 2 clinical trial found that a low-dose THC-CBD extract improved cognitive test scores in people with Alzheimer’s-related dementia over 26 weeks compared with placebo. The treatment was well tolerated, indicating possible therapeutic value for cognitive symptoms.
CBD Reduces Placental Inflammation in Preclinical Study
Preclinical research showed that CBD reduced inflammatory markers in placental tissue exposed to inflammatory stimuli. Results indicate CBD may influence immune responses at the maternal–fetal interface, though further research is needed.
Long-Acting Injectable CBD Shows Weeks-Long Presence in Calves, Suggesting Possible Use for Painful Farm Procedures
Researchers found that a long-acting injectable CBD formulation maintained detectable blood levels for several weeks in calves after a single dose and was linked to prolonged signs of pain relief, pointing to potential use in livestock pain management.
CBD-Loaded Biohybrid Micelles Show Enhanced Anti-Cancer Effects in Colon Cancer Cells
Researchers engineered CBD-loaded biohybrid micelles that improved delivery into colon cancer cells and significantly increased anticancer activity compared with CBD alone. The formulation enhanced cellular uptake and tumor-killing effects in lab tests.
Cannabidiol Shows Protective Effects Against Acute Liver Injury by Preserving Mitochondrial Function
A preclinical study found CBD helped protect against acute liver injury by stabilizing mitochondrial function and reducing oxidative stress and inflammation. Results point to CBD’s potential role in limiting liver cell damage.
Medical Marijuana Linked to Sustained Improvements in Sleep Quality Over One Year
A year-long observational study found medical marijuana use was associated with lasting improvements in sleep quality scores, with many participants reporting better sleep consistency and duration over time.
CBD May Protect the Brain From Damage Caused by Common Food and Environmental Pollutant
Researchers reported that CBD reduced oxidative stress and cellular damage in brain tissue exposed to a widely encountered food and environmental contaminant, suggesting neuroprotective potential against toxin-related injury.
Yale Study: CBD May Alter Pain Sensitivity and Opioid Craving in Patients on Methadone or Buprenorphine
A Yale study found CBD influenced pain sensitivity and reduced opioid craving in individuals receiving methadone or buprenorphine treatment, indicating possible supportive benefits during opioid use disorder therapy.
CBD Reduces Stress-Related Behaviors in Ornamental Fish During Transport
A study found that adding CBD to water during transport reduced stress behaviors in ornamental fish, suggesting a potential method for improving animal welfare during shipping.
Inhaled CBD Reverses Seizure Risk and Brain Inflammation Linked to Chronic Nicotine Pouch Use
Researchers found inhaled CBD reversed seizure susceptibility and reduced brain inflammation in an animal model exposed to chronic nicotine pouch use, indicating possible protective neurological effects.
Melatonin and Zinc Oxide Nanoparticles Boost Growth, Stress Tolerance, and Cannabinoid Production in Cannabis Sativa
A plant study showed that treating cannabis with melatonin and zinc oxide nanoparticles improved growth rates, stress resilience, and cannabinoid output, pointing to new cultivation optimization methods.
New Study Unveils High-Precision Technique for Testing Cannabinoids in Oils and Flower
Researchers developed a highly accurate testing method for measuring cannabinoids in both oils and plant material, improving consistency and reliability in laboratory cannabinoid analysis.
Cannabinoids Show Selective Antibacterial Effects Against Common Dental Pathogens
A lab study found several cannabinoids exhibited targeted antibacterial activity against bacteria linked to dental decay and gum disease, with minimal effects on beneficial oral microbes. Findings suggest potential for cannabinoid-based oral care agents pending further research.
CBD Selectively Kills Cancer Cells While Sparing Healthy Cells
Researchers reported that CBD reduced viability in multiple cancer cell lines but had limited impact on non-cancerous cells in vitro. The selective effect highlights CBD’s potential as a targeted anticancer agent, although clinical trials are still needed.
Marijuana Use Linked to Lower Mortality and Fewer Liver Complications in Patients With Fatty Liver Disease But Higher Heart Risks
An observational study found that people with fatty liver disease who use cannabis had lower adjusted mortality and fewer liver-related complications over time but were more likely to have cardiovascular events. Researchers emphasize balancing potential benefits with heart risk monitoring.
CBD Shows Broad Anti-Tumor Effects But Human Trials Still Needed
Preclinical research across multiple tumor models found CBD inhibited cancer cell growth and spread in vitro and in animals. While results are promising, authors note the need for rigorous human clinical trials to confirm therapeutic relevance.
Clinical Trial: CBD With Terpenes May Reduce Anxiety and Parental Stress in Autistic Children
A small clinical trial found that a CBD-plus-terpene formulation reduced anxiety symptoms in autistic children and eased parental stress compared with placebo. Treatment was well tolerated, though larger studies are required to validate findings.
Lesser-Known Marijuana Compounds Like CBDV and CBG Can Reduce Inflammation, Especially When Combined
A new study found that combining lesser-known cannabinoids such as cannabidivarin (CBDV) and cannabigerol (CBG) produced stronger anti-inflammatory effects in lab models than when each was used alone, suggesting synergistic potential for these compounds in inflammation-related conditions.
CBD May Enhance Chemotherapy Effects in Brain Cancer Models
Preclinical research indicates that CBD can improve the effectiveness of certain chemotherapy drugs in brain cancer cell lines and animal models, increasing cancer cell death and slowing tumor growth. The findings support further investigation of CBD as an adjunct in brain cancer therapy.
THC and CBD Combination Shows Promise for Migraine Relief
A study reported that a balanced THC-CBD formulation reduced migraine frequency and intensity in participants compared with placebo, with good tolerability. Researchers suggest cannabinoids could offer an alternative or complement to existing migraine treatments.
High-Dose CBD Performs Similarly to Standard Pain Medications After Tooth Extractions
In a controlled trial, high-dose CBD provided pain relief after dental extractions comparable to common painkillers, with a favorable side-effect profile. The results point to potential use of CBD in post-surgical pain management.
Topical Cannabis Balms With THC and CBD Can Ease Joint Pain From Breast Cancer Treatment
A clinical study found that topical balms containing THC and CBD reduced joint pain and stiffness in patients undergoing breast cancer therapy compared with controls, improving comfort with minimal systemic effects.
CBD Triggers Cancer Cell Death and Suppresses Melanoma Spread Through Epigenetic Pathway
A lab study found that CBD induced cancer cell death and hindered melanoma cell migration by altering epigenetic markers that regulate gene expression. Results suggest CBD’s influence on cellular regulation could help limit tumor spread, though clinical research is still needed.
Cannabidiol Shows Promise in Easing Benzodiazepine Withdrawal Symptoms
A preclinical study found that CBD reduced anxiety-like behaviors and withdrawal signs in animals undergoing benzodiazepine tapering. Researchers say the findings indicate potential for CBD to support benzodiazepine discontinuation, but human trials are necessary.
CBD Improves Cognitive Recovery After Traumatic Brain Injury by Blocking Neuronal Oxidative Stress
In a traumatic brain injury model, CBD treatment enhanced cognitive recovery and reduced markers of neuronal oxidative stress compared with controls. Findings suggest CBD’s antioxidant effects may help support neural repair after injury.
CBD Reduces Neuroinflammation Linked to Long COVID by Modulating Brain Cell Signaling
Researchers observed that CBD reduced neuroinflammation in models of long COVID by altering signaling pathways in brain cells associated with immune response. The results point to potential neuroprotective effects for long COVID symptoms.
CBD May Slow Aging in Stem Cells Used for Regenerative Medicine
A laboratory study found that CBD helped maintain stem cell characteristics and reduced cellular aging markers in stem cells cultured for regenerative medicine. This suggests CBD could support stem cell viability and function in therapeutic applications.
Lesser-Known Marijuana Compounds Like CBDV and CBG Can Reduce Inflammation, Especially When Combined
A new study found that combining lesser-known cannabinoids such as cannabidivarin (CBDV) and cannabigerol (CBG) produced stronger anti-inflammatory effects in lab models than when each was used alone, suggesting synergistic potential for these compounds in inflammation-related conditions.
CBD May Enhance Chemotherapy Effects in Brain Cancer Models
Preclinical research indicates that CBD can improve the effectiveness of certain chemotherapy drugs in brain cancer cell lines and animal models, increasing cancer cell death and slowing tumor growth. The findings support further investigation of CBD as an adjunct in brain cancer therapy.
THC and CBD Combination Shows Promise for Migraine Relief
A study reported that a balanced THC-CBD formulation reduced migraine frequency and intensity in participants compared with placebo, with good tolerability. Researchers suggest cannabinoids could offer an alternative or complement to existing migraine treatments.
High-Dose CBD Performs Similarly to Standard Pain Medications After Tooth Extractions
In a controlled trial, high-dose CBD provided pain relief after dental extractions comparable to common painkillers, with a favorable side-effect profile. The results point to potential use of CBD in post-surgical pain management.
