Folha de evidência científica · Judici Cannabis

Regulação enfraquece o mercado ilegal

A legalização/regulação reduz o mercado ilícito e a violência associada? — Evidência de jurisdições reguladas (EUA, Canadá, Uruguai): deslocamento do mercado ilícito para o legal e efeitos sobre crime/violência — argumento de segurança pública. Efeitos heterogêneos, mostrados com os dois lados.

força líquida 0.00 consenso 70 · consenso forte Controversa 31 estudos · 8 apoiam · 7 refutam 97% ≥2020 29% alto nível

📐 Números que convencem

aumento de consumo de cannabis de 22% em 2018 para 27% em 2022

How have cannabis use and related indicators changed since legalization of cannabis for non-medical purposes? Results of the Canadian Cannabis Survey 2018-2022. (2024) · DOI: 10.1016/j.drugpo.2024.104385

maior probabilidade de comportamentos de controle de peso não saudáveis (AOR até 3.12)

Marijuana use and its association with unhealthy weight control and muscle-enhancing behaviors among sexual minority men in the United States: a cross-sectional analysis. (2026) · DOI: 10.1186/s42238-026-00398-9

aumento de 17% nas chamadas de exposição a cannabis anualmente

Impact of legalization on cannabis exposure calls to the British Columbia Poison Control Centre. (2026) · DOI: 10.17269/s41997-025-01022-8

captura de mercado legal de 78%

Transitions to legal cannabis markets: Legal market capture of cannabis expenditures in Canada following federal cannabis legalization. (2025) · DOI: 10.1016/j.drugpo.2025.104828

medical cannabis decreased to 3.7% of the market post-RCL vs 11.8% antes

Association of recreational cannabis legalization with changes in medical, illegal, and total cannabis expenditures in Canada. (2025) · DOI: 10.1016/j.drugpo.2025.104793

aumento de 31.6 pontos percentuais na obtenção de cannabis de fontes legais

How Consumers Transition Between Illicit and Legal Cannabis Markets in Early Legalization Periods? Evidence from a National Panel with a Recent Policy Shock (2026) · Research Square · DOI: 10.21203/rs.3.rs-9381647/v1

✅ Evidências que apoiam (8)

apoiaHow have cannabis use and related indicators changed since legalization of cannabis for non-medical purposes? Results of the Canadian Cannabis Survey 2018-2022.

Goodman S, Dann MJ, Fataar F, Abramovici H (2024) · revisao narrativa · força 0.38 · DOI
aumento de consumo de cannabis de 22% em 2018 para 27% em 2022

apoiaMarijuana use and its association with unhealthy weight control and muscle-enhancing behaviors among sexual minority men in the United States: a cross-sectional analysis.

Ibeh C, Zhao Y, Tran A (2026) · ensaio clinico · força 0.33 · DOI
maior probabilidade de comportamentos de controle de peso não saudáveis (AOR até 3.12)

apoiaEstimating Price Elasticity of Cannabis Use Among U.S. Adolescents: Evidence From States With Recreational Cannabis Commercialization.

Han B, Park H, He Y, Shang C, Shi Y (2026) · ensaio clinico · força 0.33 · DOI
aumento de preços de cannabis associado a menor probabilidade de uso atual

apoiaImpact of legalization on cannabis exposure calls to the British Columbia Poison Control Centre.

Trieu J, Dobbin N, Henderson SB, McVea D (2026) · outro · força 0.33 · DOI
aumento de 17% nas chamadas de exposição a cannabis anualmente

apoiaTransitions to legal cannabis markets: Legal market capture of cannabis expenditures in Canada following federal cannabis legalization.

Hammond D, Hong D, Rundle S, Iraniparast M, Kilmer B, Wadsworth E (2025) · outro · força 0.33 · DOI
captura de mercado legal de 78%

apoiaAssociation of recreational cannabis legalization with changes in medical, illegal, and total cannabis expenditures in Canada.

McDonald AJ, Cooper A, Doggett A, Halladay J, Belisario K, MacKillop J (2025) · outro · força 0.33 · DOI
medical cannabis decreased to 3.7% of the market post-RCL vs 11.8% antes

apoiaHigh stakes: how legal cannabis pricing impacts the illicit market.

Hebert R, Boehnke KF, Joshi S (2026) · outro · força 0.33 · DOI
preços ilícitos mais baixos em estados com dispensários recreativos

apoiaHow Consumers Transition Between Illicit and Legal Cannabis Markets in Early Legalization Periods? Evidence from a National Panel with a Recent Policy Shock

Xu L, Zhang S, Su K, Shang C (2026), Research Square · ensaio clinico · força 0.33 · DOI
aumento de 31.6 pontos percentuais na obtenção de cannabis de fontes legais

⚠️ Evidências que refutam (7) — transparência

refutaThe Colombian Medical Cannabis Paradox: A Scoping Review of Structural Barriers and Health Inequity.

Marín Arroyave OP, León Cruz P (2025) · força 0.98 · DOI

refutaCharacteristics of trauma patients involved in motor vehicle collisions before and after legalization of medical marijuana in Pennsylvania.

Gimbel K, Marco CA (2026) · força 0.63 · DOI

refutaPost-legalization shifts in cannabis use among young adults in Georgia-A nationally representative study.

Nadareishvili I, Rao SR, Otiashvili D, Gnatienko N, Samet JH, Lunze K et al. (2025) · força 0.37 · DOI

refutaCommercial cannabis product testing: Fidelity to labels and regulations.

Limbacher SA, Godbole S, Wrobel J, Mackie DI, Goldman S, Brooks-Russell A (2026) · força 0.35 · DOI

refutaIs cannabis legalization associated with treatment completion? A study of pregnant women admitted for cannabis use in substance use treatment facilities, 2020-2022.

Carandang RR, Rhee TG, Ha T, Cunningham SD (2026) · força 0.33 · DOI

refutaRevisiting the Gateway Drug Hypothesis for Cannabis: A Secondary Analysis of a Nationwide Survey Among Community Users in Japan.

Masataka Y, Katayama M, Umemura F, Sugiyama T, Miki N, Akahoshi Y et al. (2025) · força 0.33 · DOI

Folha gerada em 28/09/2026 pela plataforma Judici Cannabis. Evidência real e rastreável (DOI). 16 estudo(s) de contexto (revisões/mecanístico) não listados. Força líquida = apoio − refutação ponderado; maturidade por regras explícitas. Não substitui aconselhamento médico/jurídico.

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