Evidence map›Paper›PMID 33783029›Full record

ReviewDrug and alcohol review2021

Advancing the science on cannabis concentrates and behavioural health.

L Cinnamon Bidwell, Renée Martin-Willett, Hollis C Karoly

Registry-linked trialOpen access · greenAbstract readReview
In one paragraph

Review in Drug and alcohol review, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT06077292 (Impacts of THC Potency of Cannabis Concentrates and THC Metabolism on Cognitive Impairment in Young Adults), which is not on this map. Cited by 38 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
38citing papers in PubMed, 1 pooled it
6.6field-weighted citation impact, top 3% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

NCT06077292 nasuspendednot on this mapstarted 2025, after this paper: background citation

Impacts of THC Potency of Cannabis Concentrates and THC Metabolism on Cognitive Impairment in Young Adults

TypeinterventionalSponsorUniversity of California, San FranciscoRan2025 to 2026Enrolled110ConditionsCannabis Use, THC, Marijuana Use, Cognitive ImpairmentArms15% THC Potency Reduction, 35% THC Potency Reduction
3 · Its place in the literature

Who cites it

38 citing papers in PubMed, 1 synthesis or guideline pooled it, 50 citations in OpenAlex.

  1. Pooled it
  2. Article
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  7. Article
  8. Article
  9. Cannabis concentrate vaping chemistry.Frontiers in toxicology · 2025
    Review
  10. Article
  11. Article
  12. Review
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  15. Article
  16. Review
  17. Review
  18. Review
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors at 1 institution in 1 country.

L Cinnamon BidwellInstitute of Cognitive Science, University of Colorado Boulder, Boulder, USA.ORCID 0000-0001-6762-7586
Renée Martin-WillettDepartment of Psychology and Neuroscience, University of Colorado Boulder, Boulder, USA.
Hollis C KarolyInstitute of Cognitive Science, University of Colorado Boulder, Boulder, USA.
University of Colorado Boulder · US

Funding

Shared mechanisms of alcohol use disorder and Anxiety and effects of the endocannabinoid systemF31AA029632 · NIAAA · UNIVERSITY OF COLORADO · PI MARTIN-WILLETT, RENEE · 2021 to 2023
$125k
NIAAA NIH HHS F31 AA029632
6 · The paper itself

Abstract

issuesThe Cannabis sativa L. plant contains hundreds of phytocannabinoids, but putatively of highest importance to public health risk is the psychoactive cannabinoid delta-9-tetrahydrocannabinol (THC), which is associated with risk for cannabis use disorder, affective disturbance, cognitive harm and psychomotor impairment. Recently, there has been an increase in the use and availability of concentrated cannabis products (or 'concentrates') that are made by extracting cannabinoids from the plant to form a product with THC concentrations as high as 90-95%. These products are increasingly popular nationwide. The literature on these widely available high potency concentrates is limited and there are many unknowns about their potential harms. APPROACH: This review covers the state of the research on cannabis concentrates and behavioural health-related outcomes and makes recommendations for advancing the science with studies focused on accurately testing the risks in relation to critical public and behavioural health questions. KEY

findingsData point to unique behavioural health implications of concentrate use. However, causal, controlled and representative research on the effects of cannabis concentrates is currently limited. IMPLICATIONS: Future research is needed to explore chronic, acute and developmental effects of concentrates, as well as effects on pulmonary function. We also highlight the need to explore these relationships in diverse populations.

conclusionWhile the literature hints at the potential for these highly potent products to increase cannabis-related behavioural health harms, it is important to carefully design studies that more comprehensively evaluate the impact of concentrates on THC exposure and short- and long-term effects across user groups.

Indexed as

CannabinoidsCannabisHallucinogensSubstance-Related DisordersAnalgesicsHumansAnalgesicsCannabinoidsHallucinogenscannabis concentratedelta-9-tetrahydrocannabinolmarijuanatetrahydrocannabinol

Identifiers

PMID33783029
PMCPMC9878551
OpenAlexW3144612925

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.