Evidence syntheses
Systematic reviews, meta-analyses, evidence reports, and consensus reviews with transparent methods.
SOURCE STANDARD
Evidence before amplification
We link to the material that supports the grade, not just commentary about it.
Public authorities
Regulators, public-health agencies, clinical guidelines, statutes, and official legal sources.
Primary studies
Human trials and observational studies, interpreted with design limits, sample, endpoints, and conflicts visible.
Preclinical and commentary
Animal, laboratory, press, and expert commentary can frame a question but cannot alone prove a human health claim.
Launch source register
- CDC — Cannabis and DrivingDriving impairment record
- CDC — Cannabis and Lung HealthSmoke and respiratory record
- CDC — Understanding Your Risk for Cannabis Use DisorderDependence-risk record
- FDA — Products Containing Cannabis or Cannabis-derived CompoundsCBD approval boundary
- National Cancer Institute — Cannabis and Cannabinoids (PDQ)Cancer-treatment claim boundary
- National Academies — The Health Effects of Cannabis and CannabinoidsEvidence synthesis
Links were selected and accessed for the launch review on 2026-07-12. A source being listed does not imply that the publisher endorses Marijuana Fact Check.