Increasing delta-9-tetrahydrocannabinol (Δ-9-THC) content in herbal cannabis over time: systematic review and meta-analysis.

CONCLUSIONS: The results of the analysis suggest that there has been a recent and consistent increase in cannabis potency worldwide. PMID: 22150622 [PubMed - indexed for MEDLINE]
Source: Current Drug Abuse Reviews - Category: Addiction Tags: Curr Drug Abuse Rev Source Type: research