# Cannabinoid Clinical Trials: CBD, Glucose & Gut Health > **Author:** Benjamin Caplan, MD (ABFM Board Certified, MA Lic. #240562, NPI: 1962722637) > **Publisher:** CED Clinic (https://cedclinic.com) > **Canonical URL:** https://cedclinic.com/cannabinoid-clinical-trials-cbd-glucose/ > **Published:** 2026-03-18T22:39:58-04:00 | **Last Modified / Clinically Audited:** 2026-09-28T11:05:28-04:00 > **Clinical Summary:** Explore cannabinoid clinical trials CBD glucose effects on metabolic health and gut microbiome in adults with overweight or obesity. --- #### Clinical Takeaway In this pilot study, short-term low-dose CBD supplementation did not produce measurable improvements in glucose tolerance, gut microbiome composition, or inflammatory markers in sedentary adults with overweight or obesity. While animal studies and epidemiological observations have suggested a potential protective role for cannabinoids in metabolic health, these findings indicate that dose, duration, and population factors may critically shape any such effect. Larger, longer-duration trials with varied dosing protocols are needed before clinical conclusions can be drawn. ### #3 Short-Term Low Dose Cannabidiol Does Not Influence Glucose Tolerance or the Gut Microbiome in Sedentary Adults with Overweight and Obesity: Pilot Study. **Citation:** Ewell Taylor R et al. *Short-Term Low Dose Cannabidiol Does Not Influence Glucose Tolerance or the Gut Microbiome in Sedentary Adults with Overweight and Obesity: Pilot Study.* Cannabis and [cannabinoid research](https://cedclinic.com/cannabinoids-in-reward-processing-pain-perception/). 2026. PMID: 41167732. **Study type:** Journal Article, Randomized Controlled Trial  |  **Topic area:** Cannabidiol  |  **CED Score:** 12 Design: 5 Journal: 1 N: 0 Recency: 3 Pop: 2 Human: 1 Risk: 0 **Abstract:** INTRODUCTION: Epidemiological data indicate that regular users of cannabis products may be protected from type 2 diabetes, although the mechanism is not understood. Observations from animal studies suggest that the cannabinoid, cannabidiol (CBD) may protect/improve glucose tolerance; an effect that may be partially mediated by favorable modifications to the gut microbiome. The aims of the current pilot project were to gain initial insight into the influence of short-term CBD ingestion on oral glucose tolerance, the gut microbiome, and inflammation in sedentary adults with overweight or obesity and free from diabetes. MATERIALS AND METHODS: Using a randomized, double-blind, repeated measures, parallel design, oral glucose tolerance was determined in 16 adults (6 males, 10 females) prior to and following 4 weeks of daily ingestion of either placebo or CBD (30 mg every 12 h). Fecal samples were collected at baseline and post-intervention. RESULTS: Compared with placebo, CBD did not influence glucose tolerance (Matsuda Index: placebo-pre 7.6 [5.5], placebo-post 10.1 [5.5], vs. CBD-pre 11.7 [7.9], and hCBD-post 10.1 [10.2]; median [interquartile range]; p > 0.05). Characteristics of the gut microbiome or inflammation were not appreciably modified by CBD or placebo. DISCUSSION: Short-term daily ingestion of low-dose CBD did not appear to favorably modify glucose tolerance in sedentary adults with overweight or obesity. It is possible that CBD may not account for the previously reported protection from type 2 diabetes bestowed to regular users of cannabis products.  |  [View on PubMed ↗](https://pubmed.ncbi.nlm.nih.gov/41167732/)[DOI ↗](https://doi.org/10.1177/25785125251391085) [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. 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[Read More](https://cedclinic.com/short-term-low-dose-cannabidiol-glucose-tolerance-study/) [Cannabidiol & Glucose Tolerance: Clinical Evidence Review](https://cedclinic.com/cannabidiol-glucose-tolerance-clinical-evidence/) A comprehensive review of clinical evidence on cannabidiol's effects on [glucose metabolism](https://cedclinic.com/tetrahydrocannabinol-brain-glucose-consumption-metabolic-modulation/). [Explore Review](https://cedclinic.com/cannabidiol-glucose-tolerance-clinical-evidence/) [Cannabidiol & Glucose Tolerance: Clinical Research Findings](https://cedclinic.com/short-term-low-dose-cannabidiol-glucose-tolerance/) Research findings on the relationship between cannabidiol and glucose tolerance in clinical settings. [Discover Insights](https://cedclinic.com/short-term-low-dose-cannabidiol-glucose-tolerance/) Have thoughts on this? 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