Each month our editorial team sifts through hundreds of papers and curates notable findings—for practitioners and informed readers who want to stay current with the evidence. Subscribe to the monthly Research Digest for expert analysis and concise summaries of key papers.
This review collected human studies on how cannabidiol (CBD) is absorbed, distributed, and cleared. From 792 records, 24 studies reported pharmacokinetic (PK) data. Results varied by how CBD was given and by formulation. For example, smoking produced faster and higher blood levels than oral or oromucosal routes. The authors concluded…
This article explains how workplace drug testing for marijuana usually looks for an inactive THC metabolite in urine. A positive urine test does not prove a person was impaired or recently using marijuana. Tests usually start with a quick screen and then use a lab confirmation. Urine is the most…
The study examined 39 FDA Warning Letters about CBD products issued from 2015 to 2019. It found most violations were online (websites and social media) and that nearly all letters (97%) cited companies marketing CBD as an unapproved drug. The letters also showed widespread claims that CBD could treat many…
This study gave the same oral dose of cannabidiol (CBD) to male and female rats using three product types: isolate, broad‑spectrum, and full‑spectrum. When CBD was given as a full‑spectrum product that included about 0.2% THC, CBD blood levels were higher than with isolate or broad‑spectrum. Lab tests showed THC…
