PubHawk
May 2021 PMID 33160291

Changes in delta-9-tetrahydrocannabinol (THC) and cannabidiol (CBD) concentrations in cannabis over time: systematic review and meta-analysis.

Tom P Freeman, Sam Craft, Jack Wilson, Stephan Stylianou, Mahmoud ElSohly, Marta Di Forti, Michael T Lynskey

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Mentions

338
Peak: 71 in Nov 2020
across 7 sources since Nov 2020

Extended reach

1,496,424
potential audience

Total likes

824

Video views

17,262

Mentions per month

Nov 2020 – Aug 2025

Where it's discussed

  • News161 articles
  • X / Twitter145 posts
  • Blogs11 articles
  • Facebook8 posts
  • YouTube5 videos
  • Reddit5 posts
  • Bluesky3 posts

AI synopsis

What people are saying

Several discussions emphasize the trend of increasing THC concentrations in cannabis, highlighting specific statistics like the annual increase of approximately 0.29%. Phrases such as 'modern marijuana contains substantially more THC' illustrate a concern about potential health impacts. The tone of urgency and caution in many posts points to a deeper societal context regarding cannabis potency and its effects.

AgreementModerate agreement

The majority of posts reflect a consensus on the study's findings regarding increasing THC levels in cannabis.

InterestHigh interest

There is a notable curiosity shown towards how cannabis potency has evolved, suggesting a high level of interest.

EngagementModerate engagement

While many posts acknowledge the study, only a few delve deeply into the implications, indicating moderate engagement.

ImpactHigh impact

Participants believe the research has significant implications for public understanding of cannabis use and health risks, suggesting a high perceived impact.

Abstract in brief

  • This study reviewed how THC and CBD concentrations in cannabis have changed over time, analyzing data from 12 studies across multiple countries.
  • THC levels increased significantly, with herbal cannabis rising by 0.29% annually and cannabis resin by 0.57% annually.
  • No significant changes in CBD concentrations were found in either herbal cannabis or resin during the studied time frames.
Read the full abstract

Top posts

Most liked on X and Bluesky
TheFrenchEpidemiologist
@frenchepidemio · X

Nouvelle vidéo sur le CBD (Cannabidiol), le THC et l'huile à base de CBD/Chanvre : quels impacts sur la santé ? Par quels mécanismes biologiques ? Comment extrait-on le #CBD ? https://t.co/LAPSIrFIb5 Globalement il y a quasi pas d'étude hum. sur l'huile à base de chanvre/CBD

Nov 21, 2021 · 53 likes · 16 shares · 15,185 followers View post →
Rasmussen Reports
@Rasmussen_Poll · X

High Potency Marijuana Background Links: CDC: https://t.co/Jm6az6hxHK. SSA: https://t.co/R7z1zP5wM4 CNN Article: "Highly potent weed creating marijuana addicts worldwide, study says" - https://t.co/0P0VFndrc8 https://t.co/JjY3icOJxZ

Sep 30, 2022 · 27 likes · 19 shares · 609,819 followers View post →
The Matilda Centre
@TheMatilda_USyd · X

1/3 Matilda Centre #PhD candidate @Jack_MWilson joined an international team of researchers to conduct a cross-temporal meta-analysis to investigate changes in concentrations of #THC and #CBD in #cannabis over time.

Nov 8, 2020 · 23 likes · 15 shares · 4,800 followers View post →
Akin Olokun
@AkinOlokun · X

Owing to hybridization, the strength of cannabis has soared over the past 50 years. Modern marijuana contains substantially more tetrahydrocannabinol (THC) than traditional cannabis, rendering it less biochemically stable and more psychoactive & addictive. https://t.co/bZNan8xIbp

Jan 17, 2021 · 16 likes · 7 shares · 39,469 followers View post →
Addiction Journal
@AddictionJrnl · X

Read the research here https://t.co/hocbJ3Dso6 https://t.co/JGqbnVT73J

Nov 20, 2020 · 12 likes · 3 shares · 15,022 followers View post →
Joar Guterstam
@joarguterstam · X

Ny systematisk översikt bekräftar att THC-koncentrationen i cannabis stigit påtagligt över tid. Däremot syns inga tydliga förändringar i CBD-halterna. https://t.co/e3D2yjjDH0 https://t.co/fNjKEljnio

Nov 13, 2020 · 11 likes · 3 shares · 3,734 followers View post →

All mentions

Szymon
@Szymonjer · X

@wi5ni4 @speedeufo @ZMostuProsto @JudaszIskariot3 @SledziuStream @PMilenials Szkoda że bredzisz jakieś kocopoły na Twitterze zamiast się douczyć. https://t.co/GijZlxxsvr https://t.co/enE2EJhr3Y Dodatkowo np. David Nutt "Drugs without the hot air" Ja poproszę za to chociaż jedno które by przeczyło mojej tezie.

Aug 27, 2025 View post →
James Esparza_TapeDamage
@nkjamesv · X

@ThomasConnorsJr @RAZ0RFIST @MrHandy33 I wish you were right as I am quite neutral on the matter. But there has been many studies done that make me quite confident in that statement. These are about a few. https://t.co/WXXeZHmebT https://t.co/EiENAcJNqo https://t.co/dqukWiUuKE https://t.co/uPPna4w5PN

Jul 1, 2025 · 182 followers View post →
Wabi-Sabi
@JonSnpEf · X

https://t.co/myEFh9CfkP

Oct 22, 2024 · 1,649 followers View post →
The Mental Elf
@Mental_Elf · X

Cannabis products have changed a lot over recent years - it has evolved from 4% THC to 15% THC and now up to 80% THC products are entering the market https://t.co/aC0wJEFWcr #BAP2024

Jul 21, 2024 · 2 likes · 99,529 followers View post →
Liza Lockwood
@DrLizaMD · X

RT @toxicologist12: THC (main psychoactive ingredient) concentration has greatly increased in herbal cannabis products since the 1970s. Yo…

Mar 7, 2024 · 3 shares · 9,766 followers View post →
Corey Hazekamp
@coreyhazekamp · X

RT @toxicologist12: THC (main psychoactive ingredient) concentration has greatly increased in herbal cannabis products since the 1970s. Yo…

Mar 7, 2024 · 3 shares · 242 followers View post →
Matt Stanton
@RxMilwaukee · X

RT @toxicologist12: THC (main psychoactive ingredient) concentration has greatly increased in herbal cannabis products since the 1970s. Yo…

Mar 7, 2024 · 3 shares · 716 followers View post →
Andrew Stolbach, MD, MPH
@toxicologist12 · X

THC (main psychoactive ingredient) concentration has greatly increased in herbal cannabis products since the 1970s. Your mom was right when she warned you! 1/ https://t.co/1Q6ZCxemHC https://t.co/Myz6XpuPKu

Mar 7, 2024 · 4 likes · 3 shares · 9,963 followers View post →
ElectraTect
@ElectraTect · X

Did you know that the #cannabis used today may make people feel more #impaired than cannabis used years ago? One study found that each year the #THC content of herbal cannabis increases by an average of 0.29% each year. #ElectraTect #FairMarijuanaTesting https://t.co/d3dYQ1ZhhO https://t.co/cbRYXEzo74

Jul 6, 2023 · 1 like · 149 followers View post →
klhoughton
@klhoughton · X

RT @DavidAOliverJr: @jenniferdoleac https://t.co/RUWnJcFAEU

May 21, 2023 · 1 share · 1,049 followers View post →
David A. Oliver
@DavidAOliverJr · X

@jenniferdoleac https://t.co/RUWnJcFAEU

May 21, 2023 · 1 like · 1 share · 928 followers View post →
Scott
@applypressure28 · X

@B3Ungovernable @_BarringtonII @MonashTerbecki https://t.co/Y6DmXVqnOW

Jan 12, 2023 · 655 followers View post →
Scott
@applypressure28 · X

@DaddyLoser @_BarringtonII @MonashTerbecki https://t.co/Y6DmXVqnOW https://t.co/MBwYVLUgVi https://t.co/TtE5z1IYq7

Jan 12, 2023 · 1 like · 655 followers View post →
Scott
@applypressure28 · X

@ExtractedVideo @_BarringtonII @MonashTerbecki Heres a study from 2020. https://t.co/Y6DmXVqnOW Heres one from France measuring THC levels from 1995 until 2016. Every single year THC levels go higher. It's gone higher from 2015-2020 while measuring THC the same way https://t.co/TtE5z1IYq7 https://t.co/D6lPqc1mpb

Jan 12, 2023 · 655 followers View post →
tapyplus
@tapyplus · X

@Looping_ Plus à jour : https://t.co/GGppLFFN6s https://t.co/w07KzFStVZ

Oct 23, 2022 · 1 like · 363 followers View post →
Blue Ultra MAGA
@lkat1356 · X

RT @Rasmussen_Poll: High Potency Marijuana Background Links: CDC: https://t.co/Jm6az6hxHK. SSA: https://t.co/R7z1zP5wM4 CNN Article: "Hi…

Oct 1, 2022 · 19 shares · 2,462 followers View post →
Mike Beaudreau
@MikeB_Senate9 · X

RT @Rasmussen_Poll: High Potency Marijuana Background Links: CDC: https://t.co/Jm6az6hxHK. SSA: https://t.co/R7z1zP5wM4 CNN Article: "Hi…

Oct 1, 2022 · 19 shares · 643 followers View post →
What about the news?⚡️⚡️
@Whataboutthene1 · X

RT @Rasmussen_Poll: High Potency Marijuana Background Links: CDC: https://t.co/Jm6az6hxHK. SSA: https://t.co/R7z1zP5wM4 CNN Article: "Hi…

Sep 30, 2022 · 19 shares · 371 followers View post →
Lyretail
@Lyretail1982 · X

RT @Rasmussen_Poll: High Potency Marijuana Background Links: CDC: https://t.co/Jm6az6hxHK. SSA: https://t.co/R7z1zP5wM4 CNN Article: "Hi…

Sep 30, 2022 · 19 shares · 2,291 followers View post →
MojoSurfer
@mojo_surfer · X

RT @Rasmussen_Poll: High Potency Marijuana Background Links: CDC: https://t.co/Jm6az6hxHK. SSA: https://t.co/R7z1zP5wM4 CNN Article: "Hi…

Sep 30, 2022 · 19 shares · 269 followers View post →
Bob Golliver
@bob_golliver · X

RT @Rasmussen_Poll: High Potency Marijuana Background Links: CDC: https://t.co/Jm6az6hxHK. SSA: https://t.co/R7z1zP5wM4 CNN Article: "Hi…

Sep 30, 2022 · 19 shares · 2,748 followers View post →
Avi Viewpoint
@truthorbare · X

RT @Rasmussen_Poll: High Potency Marijuana Background Links: CDC: https://t.co/Jm6az6hxHK. SSA: https://t.co/R7z1zP5wM4 CNN Article: "Hi…

Sep 30, 2022 · 19 shares · 3,316 followers View post →
fonedoc
@fonedoc · X

RT @Rasmussen_Poll: High Potency Marijuana Background Links: CDC: https://t.co/Jm6az6hxHK. SSA: https://t.co/R7z1zP5wM4 CNN Article: "Hi…

Sep 30, 2022 · 19 shares · 504 followers View post →
ng224
@An6r0m3da · X

RT @Rasmussen_Poll: High Potency Marijuana Background Links: CDC: https://t.co/Jm6az6hxHK. SSA: https://t.co/R7z1zP5wM4 CNN Article: "Hi…

Sep 30, 2022 · 19 shares · 993 followers View post →
Randy Lahey
@M721M721 · X

RT @Rasmussen_Poll: High Potency Marijuana Background Links: CDC: https://t.co/Jm6az6hxHK. SSA: https://t.co/R7z1zP5wM4 CNN Article: "Hi…

Sep 30, 2022 · 19 shares · 204 followers View post →
k.J.
@Youngtexn · X

RT @Rasmussen_Poll: High Potency Marijuana Background Links: CDC: https://t.co/Jm6az6hxHK. SSA: https://t.co/R7z1zP5wM4 CNN Article: "Hi…

Sep 30, 2022 · 19 shares · 2,284 followers View post →
Al
@dcshootscore · X

RT @Rasmussen_Poll: High Potency Marijuana Background Links: CDC: https://t.co/Jm6az6hxHK. SSA: https://t.co/R7z1zP5wM4 CNN Article: "Hi…

Sep 30, 2022 · 19 shares · 342 followers View post →
Susan in laguna
@Susaninlaguna · X

RT @Rasmussen_Poll: High Potency Marijuana Background Links: CDC: https://t.co/Jm6az6hxHK. SSA: https://t.co/R7z1zP5wM4 CNN Article: "Hi…

Sep 30, 2022 · 19 shares · 20,163 followers View post →
Zeinab Berry
@ZenabBerry12 · X

RT @Rasmussen_Poll: High Potency Marijuana Background Links: CDC: https://t.co/Jm6az6hxHK. SSA: https://t.co/R7z1zP5wM4 CNN Article: "Hi…

Sep 30, 2022 · 19 shares · 1,416 followers View post →
Takao YOSHIDA
@TakaoYOSHIDA6 · X

RT @Rasmussen_Poll: High Potency Marijuana Background Links: CDC: https://t.co/Jm6az6hxHK. SSA: https://t.co/R7z1zP5wM4 CNN Article: "Hi…

Sep 30, 2022 · 19 shares · 20,513 followers View post →
trades02
@trades021 · X

RT @Rasmussen_Poll: High Potency Marijuana Background Links: CDC: https://t.co/Jm6az6hxHK. SSA: https://t.co/R7z1zP5wM4 CNN Article: "Hi…

Sep 30, 2022 · 19 shares · 1,211 followers View post →
kc
@KC_roots · X

RT @Rasmussen_Poll: High Potency Marijuana Background Links: CDC: https://t.co/Jm6az6hxHK. SSA: https://t.co/R7z1zP5wM4 CNN Article: "Hi…

Sep 30, 2022 · 19 shares · 2,586 followers View post →
Rasmussen Reports
@Rasmussen_Poll · X

High Potency Marijuana Background Links: CDC: https://t.co/Jm6az6hxHK. SSA: https://t.co/R7z1zP5wM4 CNN Article: "Highly potent weed creating marijuana addicts worldwide, study says" - https://t.co/0P0VFndrc8 https://t.co/JjY3icOJxZ

Sep 30, 2022 · 27 likes · 19 shares · 609,819 followers View post →
GG
@_gg_eashwarran · X

https://t.co/j6PT0ROdYq

Sep 8, 2022 · 2,251 followers View post →
Ideas have People* ✌
@AbleDParyon · X

Die Kiffgras-Blase, schickt mir Artikel einer Witz-Zeitung die belegen soll das es eine realexistierende Lügenpresse gibt die Kiffgras dämonisiert. "66 747 cannabis samples from eight studies, 1970–2017" sagt was anderes. https://t.co/7PsWpOP8ev https://t.co/9bNUtnMcgA https://t.co/vxxBmeYeXu

Jul 13, 2022 · 2,283 followers View post →
upsidedown4321
@upsidedown4321 · X

@eoin0 @TweeterReynolds The claim about strength or preference of policy? If former, you'll already know they exist. Here, for example: https://t.co/IVQVsqyTSO If latter, I make no claim about outcomes. I'd just prefer to live in a world where I (and children) don't encounter the aroma outdoors.

Jul 10, 2022 · 25 followers View post →
The Mental Elf
@Mental_Elf · X

Read more about how the make-up of cannabis has changed over time in Tom’s @AIM_Bath systematic review here: #SMHR22 https://t.co/aC0wJEGu1Z

Mar 24, 2022 · 99,529 followers View post →
TheFrenchEpidemiologist
@frenchepidemio · X

Mes dernières vidéos : Sur le cannabis et le cannabidiol CBD https://t.co/e6KE8bnCtB Le microbiote intestinal et la santé : https://t.co/UKPabFlF4S Crispr-CAS9 en thérapie génique chez l'Homme : https://t.co/QGmGcPD2lq Le bio et la santé https://t.co/idmpt4Qnuz

Mar 10, 2022 · 15,185 followers View post →
warthogtk
@warthogtk · X

https://t.co/j2DIuxT2k3

Jan 18, 2022 · 1,711 followers View post →
medicannastore
@medicannastore · X

CBD, huile de Cannabidiol, THC, médicaments à base de cannabis : le point santé https://t.co/sHht57qr2q https://t.co/2Hws9Urs4c https://t.co/QRtDnPKR5x

Nov 29, 2021 · 1 like · 85 followers View post →
jolaine
@jolaine_pharma · X

RT @T_Fiolet: Nouvelle vidéo sur le CBD (Cannabidiol), le THC et l'huile à base de CBD/Chanvre : quels impacts sur la santé ? Par quels méc…

Nov 25, 2021 · 16 shares · 1,416 followers View post →
CRPV_Lille
@CRPV_Lille · X

RT @T_Fiolet: Nouvelle vidéo sur le CBD (Cannabidiol), le THC et l'huile à base de CBD/Chanvre : quels impacts sur la santé ? Par quels méc…

Nov 22, 2021 · 16 shares · 1,018 followers View post →
TheFrenchEpidemiologist
@frenchepidemio · X

Combien de temps met-on pour avoir une concentration maximale en CBD ?

Nov 22, 2021 · 3 likes · 15,185 followers View post →
alive
@akrapovitch · X

RT @T_Fiolet: Nouvelle vidéo sur le CBD (Cannabidiol), le THC et l'huile à base de CBD/Chanvre : quels impacts sur la santé ? Par quels méc…

Nov 21, 2021 · 16 shares · 293 followers View post →
Nicolas Colin
@LeChat84 · X

RT @T_Fiolet: Nouvelle vidéo sur le CBD (Cannabidiol), le THC et l'huile à base de CBD/Chanvre : quels impacts sur la santé ? Par quels méc…

Nov 21, 2021 · 16 shares · 778 followers View post →
marie
@Marie_mja77 · X

RT @T_Fiolet: Nouvelle vidéo sur le CBD (Cannabidiol), le THC et l'huile à base de CBD/Chanvre : quels impacts sur la santé ? Par quels méc…

Nov 21, 2021 · 16 shares · 759 followers View post →
jolaine
@jolaine_pharma · X

RT @T_Fiolet: La vidéo est sortie : https://t.co/LAPSIrFIb5

Nov 21, 2021 · 2 shares · 1,416 followers View post →
Alessio G
@ptialex77 · X

RT @T_Fiolet: Nouvelle vidéo sur le CBD (Cannabidiol), le THC et l'huile à base de CBD/Chanvre : quels impacts sur la santé ? Par quels méc…

Nov 21, 2021 · 16 shares · 661 followers View post →
Rosebud, GroVillejuifois
@Rosebud_94800 · X

RT @T_Fiolet: Nouvelle vidéo sur le CBD (Cannabidiol), le THC et l'huile à base de CBD/Chanvre : quels impacts sur la santé ? Par quels méc…

Nov 21, 2021 · 16 shares · 585 followers View post →
LUTTMANN Claude
@LNC6777 · X

RT @T_Fiolet: Nouvelle vidéo sur le CBD (Cannabidiol), le THC et l'huile à base de CBD/Chanvre : quels impacts sur la santé ? Par quels méc…

Nov 21, 2021 · 16 shares · 401 followers View post →
LUTTMANN Claude
@LNC6777 · X

RT @T_Fiolet: La vidéo est sortie : https://t.co/LAPSIrFIb5

Nov 21, 2021 · 2 shares · 401 followers View post →
Academicienne
@Academicienne2 · X

RT @T_Fiolet: Nouvelle vidéo sur le CBD (Cannabidiol), le THC et l'huile à base de CBD/Chanvre : quels impacts sur la santé ? Par quels méc…

Nov 21, 2021 · 16 shares · 46 followers View post →
Veilleur
@Veillechouette · X

RT @T_Fiolet: Nouvelle vidéo sur le CBD (Cannabidiol), le THC et l'huile à base de CBD/Chanvre : quels impacts sur la santé ? Par quels méc…

Nov 21, 2021 · 16 shares · 454 followers View post →
Dr. Mahamat-Saleh Yahya, PhD
@MS_Yahya_ · X

RT @T_Fiolet: Nouvelle vidéo sur le CBD (Cannabidiol), le THC et l'huile à base de CBD/Chanvre : quels impacts sur la santé ? Par quels méc…

Nov 21, 2021 · 16 shares · 4,775 followers View post →
Tipunch (sur Bluesky)
@Tipuncho · X

RT @T_Fiolet: Nouvelle vidéo sur le CBD (Cannabidiol), le THC et l'huile à base de CBD/Chanvre : quels impacts sur la santé ? Par quels méc…

Nov 21, 2021 · 16 shares · 11,461 followers View post →
CainHeleverok
@CainHeleverok · X

RT @T_Fiolet: Nouvelle vidéo sur le CBD (Cannabidiol), le THC et l'huile à base de CBD/Chanvre : quels impacts sur la santé ? Par quels méc…

Nov 21, 2021 · 16 shares · 1,403 followers View post →
TheFrenchEpidemiologist
@frenchepidemio · X

La vidéo est sortie : https://t.co/LAPSIrFIb5

Nov 21, 2021 · 2 likes · 2 shares · 15,185 followers View post →
Jérôme
@Playmogeek · X

RT @T_Fiolet: Nouvelle vidéo sur le CBD (Cannabidiol), le THC et l'huile à base de CBD/Chanvre : quels impacts sur la santé ? Par quels méc…

Nov 21, 2021 · 16 shares · 2,608 followers View post →
TheFrenchEpidemiologist
@frenchepidemio · X

Nouvelle vidéo sur le CBD (Cannabidiol), le THC et l'huile à base de CBD/Chanvre : quels impacts sur la santé ? Par quels mécanismes biologiques ? Comment extrait-on le #CBD ? https://t.co/LAPSIrFIb5 Globalement il y a quasi pas d'étude hum. sur l'huile à base de chanvre/CBD

Nov 21, 2021 · 53 likes · 16 shares · 15,185 followers View post →
katinka hmma
@hullu_rakkaus · X

@JustSaying642 @Dzienus oder eine schöne meta analyse https://t.co/KOcBnHI0k0

Oct 13, 2021 · 1,567 followers View post →
P
@psychopharmacol · X

M-A: Concentrations of THC in international herbal cannabis markets increased from 1970 to 2017 (0.29% each year; 0.11-0.47) while CBD remained stable. Increases in THC was attributable to a high‐THC "sinsemilla" variety. https://t.co/MvPLUJG7Ar https://t.co/28cEiVtvCT

Apr 19, 2021 · 576 followers View post →
Mental Health
@MentalHRetweet · X

RT @dianovaportugal: Concentrations of delta‐9‐tetrahydrocannabinol #THC which carry an increased risk of #addiction & #mentalhealth disord…

Apr 13, 2021 · 1 share · 6,765 followers View post →
Dianova Portugal
@dianovaportugal · X

Concentrations of delta‐9‐tetrahydrocannabinol #THC which carry an increased risk of #addiction & #mentalhealth disorders in international cannabis markets increased from 1970-2017 while cannabidiol #CBD remained stable https://t.co/VMMXSzwTkV @Bath_AIM @KingsIoPPN @CannabisJrnl https://t.co/OKEnMINlFa

Apr 13, 2021 · 1 share · 2,593 followers View post →
Quincy7
@SevenQuincy · X

RT @AkinOlokun: Owing to hybridization, the strength of cannabis has soared over the past 50 years. Modern marijuana contains substantially…

Mar 26, 2021 · 7 shares · 86 followers View post →
Lorenzo L
@lorenzo8300 · X

RT @AkinOlokun: Owing to hybridization, the strength of cannabis has soared over the past 50 years. Modern marijuana contains substantially…

Jan 21, 2021 · 7 shares · 431 followers View post →
RYAH Group
@RYAHDOSE · X

Why is controlled, precision dosing so important? New research reports that #cannabis potency rose a staggering❗14%❗between 1970-2017. Read the full study here: DOI: 10.1111/add.15253 & https://t.co/z4PH3XLu76

Jan 19, 2021 · 77 followers View post →
maria.marta.rocha.
@mikaoceans · X

RT @AkinOlokun: Owing to hybridization, the strength of cannabis has soared over the past 50 years. Modern marijuana contains substantially…

Jan 18, 2021 · 7 shares · 26 followers View post →
Faithful
@Faithful_Howard · X

RT @AkinOlokun: Owing to hybridization, the strength of cannabis has soared over the past 50 years. Modern marijuana contains substantially…

Jan 17, 2021 · 7 shares · 199 followers View post →
WVLF
@WVLFKobe · X

RT @AkinOlokun: Owing to hybridization, the strength of cannabis has soared over the past 50 years. Modern marijuana contains substantially…

Jan 17, 2021 · 7 shares · 1,278 followers View post →
T.Jones
@tjones_sol · X

RT @AkinOlokun: Owing to hybridization, the strength of cannabis has soared over the past 50 years. Modern marijuana contains substantially…

Jan 17, 2021 · 7 shares · 4,644 followers View post →
Akin Olokun
@AkinOlokun · X

Owing to hybridization, the strength of cannabis has soared over the past 50 years. Modern marijuana contains substantially more tetrahydrocannabinol (THC) than traditional cannabis, rendering it less biochemically stable and more psychoactive & addictive. https://t.co/bZNan8xIbp

Jan 17, 2021 · 16 likes · 7 shares · 39,469 followers View post →
Hugo López Pelayo
@Hugolpi · X

@MantheyJakob @labasedow @docsteinmetz @MKUltra1510 @stephenjbright @psychotropinst @ProfDavidNutt @ian_hamilton_ @nbiedermann_i @Dr_Anne_Schlag @Lachenmeier And other from Freeman et al https://t.co/0CxFoltbnu

Jan 8, 2021 · 3 likes · 514 followers View post →
Jano Klimas
@JanKlimas · X

Changes in delta‐9‐tetrahydrocannabinol (THC) and cannabidiol (CBD) concentrations in cannabis over time: systematic review and meta‐analysis - Freeman - - @AddictionJrnl - Wiley Online Library https://t.co/6AuygdP8p0

Jan 7, 2021 · 955 followers View post →
sweetleaf
@imsweetleaf · X

RT @cannaworldsite: We've all heard the stories about this not being your 'grandparent's weed'. Take a minute and look at the actual number…

Dec 8, 2020 · 1 share · 2,213 followers View post →
CannaWorld
@cannaworldsite · X

We've all heard the stories about this not being your 'grandparent's weed'. Take a minute and look at the actual numbers. The most potent weed they claim exists NOW, as far as they're concerned, is ~14% THC with the majority of it being <10%. https://t.co/t0As4ylMyt https://t.co/dOP9dwYHzq

Dec 8, 2020 · 9 likes · 1 share · 39,986 followers View post →
Elisardo Becoña
@DrBecona · X

RT @AddictionJrnl: Concentrations of delta‐9‐tetrahydrocannabinol (THC) in international cannabis markets increased from 1970 to 2017 while…

Dec 2, 2020 · 1 share · 1,263 followers View post →
Addiction Journal
@AddictionJrnl · X

Concentrations of delta‐9‐tetrahydrocannabinol (THC) in international cannabis markets increased from 1970 to 2017 while cannabidiol (CBD) remained stable https://t.co/ucg8bRiG67

Dec 1, 2020 · 1 like · 1 share · 15,022 followers View post →
Addiction journal
@addictionjournal.bsky.social · Bluesky

Concentrations of delta‐9‐tetrahydrocannabinol (THC) in international cannabis markets increased from 1970 to 2017 while cannabidiol (CBD) remained stable https://onlinelibrary.wiley.com/doi/abs/10.1111/add.15253

Dec 1, 2020 View post →
CannaWorld
@cannaworldsite · X

Changes in delta‐9‐tetrahydrocannabinol (THC) and cannabidiol (CBD) concentrations in cannabis over time: systematic review and meta‐analysis https://t.co/uu4JZRP07n

Nov 25, 2020 · 1 like · 39,986 followers View post →
SystematicReviewBot
@EvidenceRobot · X

RT @fundacioncanna: A systematic review and meta‐analysis concluded concentrations of #THC in international #cannabis markets increased fro…

Nov 25, 2020 · 1 share · 6,718 followers View post →
Fundacion CANNA
@fundacioncanna · X

A systematic review and meta‐analysis concluded concentrations of #THC in international #cannabis markets increased from 1970 to 2017 while #CBD remained stable. Increases in THC were greater in cannabis resin than herbal cannabis. https://t.co/JoDjfjUhpZ

Nov 25, 2020 · 1 share · 5,668 followers View post →
Terri Lewis, PhD #GratefulToBeVaccinated in TN-6
@tal7291 · X

Systematic review of Cannabis components (THC and CBT) and effects on human health https://t.co/NBPtAQoVrn

Nov 24, 2020 · 5,604 followers View post →
Tom Blickman
@tblickman · X

RT @Peter_Grinspoon: This study -- alarmingly cited in #addiction newsletter -- bemoans that #THC is going up in #cannabis but #CBD isn't.…

Nov 24, 2020 · 1 share · 3,744 followers View post →
Grinspoon -- Grinspoon on Drugs
@Peter_Grinspoon · X

This study -- alarmingly cited in #addiction newsletter -- bemoans that #THC is going up in #cannabis but #CBD isn't. The on the ground reality is that people can take CBD separately, & now have many choices of high CBD strains. https://t.co/GpWdQAQZyo

Nov 24, 2020 · 3 likes · 1 share · 35,181 followers View post →
✨Vee ✨
@AddictionTalk1 · X

RT @AddictionJrnl: Read the research here https://t.co/hocbJ3Dso6

Nov 21, 2020 · 3 shares · 123 followers View post →
SystematicReviewBot
@EvidenceRobot · X

RT @tayotony: Changes in delta‐9‐tetrahydrocannabinol (THC) and cannabidiol (CBD) concentrations in cannabis over time: systematic review a…

Nov 21, 2020 · 1 share · 6,718 followers View post →
Cameron Hillmer
@CameronHillmer · X

RT @AddictionJrnl: Read the research here https://t.co/hocbJ3Dso6

Nov 20, 2020 · 3 shares · 292 followers View post →
Chief Executive Alcohol & Drugs Action
@CEO_ADA · X

Changes in delta‐9‐tetrahydrocannabinol (THC) and cannabidiol (CBD) concentrations in cannabis over time: systematic review and meta‐analysis https://t.co/xM01Gf1aPE

Nov 20, 2020 · 1,207 followers View post →
Cyrene Jacob
@jacob_cyrene · X

#Newresearch shows that over the past 50 years street #cannabis across the #world has become substantially stronger carrying an increased risk of harm: https://t.co/6RooBcHw1K

Nov 20, 2020 · 200 followers View post →
Keith Humphreys
@KeithNHumphreys · X

RT @AddictionJrnl: Read the research here https://t.co/hocbJ3Dso6 https://t.co/JGqbnVT73J

Nov 20, 2020 · 3 shares · 17,264 followers View post →
Addiction Journal
@AddictionJrnl · X

Read the research here https://t.co/hocbJ3Dso6 https://t.co/JGqbnVT73J

Nov 20, 2020 · 12 likes · 3 shares · 15,022 followers View post →
Robert West
@robertjwest · X

RT @AddictionJrnl: You can read the research in full here https://t.co/hocbJ3Dso6

Nov 20, 2020 · 2 shares · 11,288 followers View post →
Addiction journal
@addictionjournal.bsky.social · Bluesky

You can read the research in full here https://onlinelibrary.wiley.com/doi/10.1111/add.15253

Nov 20, 2020 View post →
Addiction Journal
@AddictionJrnl · X

You can read the research in full here https://t.co/hocbJ3Dso6

Nov 20, 2020 · 2 likes · 2 shares · 15,022 followers View post →
Addiction Journal
@AddictionJrnl · X

Read the research here https://t.co/hocbJ3Dso6 https://t.co/pPdWo47YiZ

Nov 20, 2020 · 1 like · 15,022 followers View post →
Rafael O. Johnson R.
@Rojohnsonr · X

Cambios en las concentraciones de THC y CBD con el tiempo. https://t.co/x6YGRdumMi

Nov 19, 2020 · 2 likes · 348 followers View post →
Cannabis News World
@CannabisNewsW · X

Study: Wiley – Changes in delta‐9‐tetrahydrocannabinol (THC) and cannabidiol (CBD) concentrations in cannabis over time: systematic review and meta‐analysis https://t.co/ccHpfWhnD9

Nov 17, 2020 · 509 followers View post →
Ordo Fraterna Fibonacci
@OrdoFibonacci · X

Changes in delta‐9‐tetrahydrocannabinol (THC) and cannabidiol (CBD) concentrations in cannabis over time: systematic review and meta‐analysis https://t.co/BHIEwbHtZD

Nov 17, 2020 · 2,569 followers View post →
Mauro
@mauropicavet · X

@PieterHog @justafunghi Think it's based on this research: https://t.co/kzpNv5iY9U

Nov 17, 2020 · 1,417 followers View post →
TMCI Global
@TMCIglobal · X

"Increases in THC were greater in cannabis resin than herbal cannabis. Rising THC in herbal cannabis was attributable to an increased market share of high‐THC sinsemilla relative to low‐THC traditional herbal cannabis." https://t.co/doibBNdNiB https://t.co/g8eSF8gybT

Nov 17, 2020 · 1,055 followers View post →
The Quill Report
@QuillReport · X

Cannabis resin now 25 more potent, global study reveals (Rated: Objective) https://t.co/yZpP3K7Dyb

Nov 16, 2020 · 39 followers View post →
lisa witham
@cheezwitham · X

Changes in delta‐9‐tetrahydrocannabinol (THC) and cannabidiol (CBD) concentrations in cannabis over time: systematic review and meta‐analysis - Freeman - - Addiction - Wiley Online Library https://t.co/CoqLN3uTzC

Nov 16, 2020 · 8,936 followers View post →
Alan Baker
@Bericonforensic · X

https://t.co/XUEdXM4X98

Nov 16, 2020 · 3,162 followers View post →
塚目諭史
@Valkyrie0965 · X

RT @kiriharaasahi: Changes in delta‐9‐tetrahydrocannabinol (THC) and cannabidiol (CBD) concentrations in cannabis over time: systematic rev…

Nov 16, 2020 · 1 share · 435 followers View post →
Popular Hemp
@hemp_popular · X

Study: Wiley – Changes in delta‐9‐tetrahydrocannabinol (THC) and cannabidiol (CBD) concentrations in cannabis over time: systematic review and meta‐analysis https://t.co/mdLRkdccus

Nov 16, 2020 · 47 followers View post →
LeonardoSRodrigues
@le_si_ro · X

Pesquisa interessante para mostrar que a relação entre THC e crises psicóticas se fosse tão direta, como algum alardeiam, teríamos surtos em quantidades bem diferentes. #PL399SIM https://t.co/IubW5b0zVN

Nov 16, 2020 · 206 followers View post →
SystematicReviewBot
@EvidenceRobot · X

RT @UKCIA: STUDY: Changes in delta‐9‐tetrahydrocannabinol (THC) and cannabidiol (CBD) concentrations in cannabis over time: systematic revi…

Nov 16, 2020 · 1 share · 6,718 followers View post →
UKCIA
@UKCIA · X

STUDY: Changes in delta‐9‐tetrahydrocannabinol (THC) and cannabidiol (CBD) concentrations in cannabis over time: systematic review and meta‐analysis - Wiley Online https://t.co/zbqnTy83Wf

Nov 16, 2020 · 1 share · 2,656 followers View post →
imweed420
@imweed420 · X

Study: Wiley – Changes in delta‐9‐tetrahydrocannabinol (THC) and cannabidiol (CBD) concentrations in cannabis over time: systematic review and meta‐analysis https://t.co/e0J52jBdNY

Nov 16, 2020 · 2 likes · 119 followers View post →
CBD In Europe.com
@CBDInEurope · X

Study: Wiley – Changes in delta‐9‐tetrahydrocannabinol (THC) and cannabidiol (CBD) concentrations in cannabis over time: systematic review and meta‐analysis https://t.co/PRcsJ6cZuh

Nov 16, 2020 · 129 followers View post →
Education News
@Edjumicated · X

Cannabis resin now 25% more potent, global study reveals https://t.co/qHtukmc9zI

Nov 15, 2020 · 6,285 followers View post →
Ken Gusler
@kgusler · X

Changes in delta‐9‐tetrahydrocannabinol (THC) and cannabidiol (CBD) concentrations in cannabis over time: https://t.co/BDEuLOJbBP

Nov 15, 2020 · 20,045 followers View post →
Science news
@UpdateonScience · X

https://t.co/baZGWaP5Gy Cannabis resin now 25% more potent, global study reveals #sciencenews https://t.co/lVYEIK3qot

Nov 15, 2020 · 1,884 followers View post →
Marijuana
@marijuanacomau · X

@CannabisFairy69 This one..https://t.co/NOx26wZTi2

Nov 15, 2020 · 13,281 followers View post →
ScienceIO
@RedditScienceIO · X

#Health Cannabis resin now 25% more potent, global study reveals https://t.co/fyC8Z57gVz

Nov 15, 2020 · 141 followers View post →
Katherine Sawyer
@KSawyer03 · X

RT @SSA_Addiction: Changes in delta‐9‐tetrahydrocannabinol (THC) and cannabidiol (CBD) concentrations in cannabis over time: systematic rev…

Nov 15, 2020 · 3 shares · 218 followers View post →
SystematicReviewBot
@EvidenceRobot · X

RT @SSA_Addiction: Changes in delta‐9‐tetrahydrocannabinol (THC) and cannabidiol (CBD) concentrations in cannabis over time: systematic rev…

Nov 15, 2020 · 3 shares · 6,718 followers View post →
Jibran Khokhar
@DrJKhokhar · X

RT @SSA_Addiction: Changes in delta‐9‐tetrahydrocannabinol (THC) and cannabidiol (CBD) concentrations in cannabis over time: systematic rev…

Nov 15, 2020 · 3 shares · 10,771 followers View post →
Society for the Study of Addiction
@SSA_Addiction · X

Changes in delta‐9‐tetrahydrocannabinol (THC) and cannabidiol (CBD) concentrations in cannabis over time: systematic review and meta‐analysis https://t.co/Sf6tZO5Jpt

Nov 15, 2020 · 9 likes · 3 shares · 8,776 followers View post →
Society for the Study of Addiction
@addiction-ssa.org · Bluesky

Changes in delta‐9‐tetrahydrocannabinol (THC) and cannabidiol (CBD) concentrations in cannabis over time: systematic review and meta‐analysis https://onlinelibrary.wiley.com/doi/full/10.1111/add.15253#.X7E-LK_zHf0.twitter

Nov 15, 2020 View post →
Pete
@post_liberal · X

This is the study the article in The Guardian (see original tweet in this thread) is citing (if you’re interested.) https://t.co/1pdq1FDmLn https://t.co/rKytI2HQ0r

Nov 15, 2020 · 3 likes · 9,596 followers View post →
DrugNews.se
@Drug_News · X

RT @joarguterstam: Ny systematisk översikt bekräftar att THC-koncentrationen i cannabis stigit påtagligt över tid. Däremot syns inga tydlig…

Nov 14, 2020 · 3 shares · 1,519 followers View post →
Lucas Nilsson
@lucas_nilsson · X

RT @joarguterstam: Ny systematisk översikt bekräftar att THC-koncentrationen i cannabis stigit påtagligt över tid. Däremot syns inga tydlig…

Nov 14, 2020 · 3 shares · 251 followers View post →
Nicklas Kartengren
@NKartengren · X

RT @joarguterstam: Ny systematisk översikt bekräftar att THC-koncentrationen i cannabis stigit påtagligt över tid. Däremot syns inga tydlig…

Nov 13, 2020 · 3 shares · 320 followers View post →
Joar Guterstam
@joarguterstam · X

Ny systematisk översikt bekräftar att THC-koncentrationen i cannabis stigit påtagligt över tid. Däremot syns inga tydliga förändringar i CBD-halterna. https://t.co/e3D2yjjDH0 https://t.co/fNjKEljnio

Nov 13, 2020 · 11 likes · 3 shares · 3,734 followers View post →
cbdmedbot
@cbdmedbot · X

Changes in delta-9-tetrahydrocannabinol (THC) and cannabidiol (CBD) concentrations in cannabis over time: systematic review and meta-analysis. https://t.co/TGgwdGhyON

Nov 10, 2020 · 157 followers View post →
SystematicReviewBot
@EvidenceRobot · X

RT @CannabisBelge: Changes in delta-9-tetrahydrocannabinol (THC) and cannabidiol (CBD) concentrations in cannabis over time: systematic rev…

Nov 10, 2020 · 1 share · 6,718 followers View post →
SystematicReviewBot
@EvidenceRobot · X

RT @TavernedeSchaka: Changes in delta-9-tetrahydrocannabinol (THC) and cannabidiol (CBD) concentrations in cannabis over time: systematic r…

Nov 10, 2020 · 1 share · 6,718 followers View post →
Cannabis Belgique
@CannabisBelge · X

Changes in delta-9-tetrahydrocannabinol (THC) and cannabidiol (CBD) concentrations in cannabis over time: systematic review and meta-analysis. https://t.co/U0SIBW8T61

Nov 10, 2020 · 1 share · 653 followers View post →
PREMISE
@PREMISE_CRE · X

RT @TheMatilda_USyd: 1/3 Matilda Centre #PhD candidate @Jack_MWilson joined an international team of researchers to conduct a cross-tempora…

Nov 9, 2020 · 15 shares · 746 followers View post →
Caitlin Ward
@caitlinruthward · X

RT @TheMatilda_USyd: 1/3 Matilda Centre #PhD candidate @Jack_MWilson joined an international team of researchers to conduct a cross-tempora…

Nov 9, 2020 · 15 shares · 288 followers View post →
Greenthumb_one
@Greenthumb_one · X

Full-text pdf: https://t.co/53yGDelAEw https://t.co/7XH0W16hhA https://t.co/aPIyyjoFy7

Nov 9, 2020 · 4,503 followers View post →
Dr. CannaFit
@Dr_CannaFit · X

It might not surprise you to learn that over the past decades the concentration of THC in cannabis products has been steadily increasing by ~0.3-0.6% a year. However over that same time CBD concentration in those same prosdicts has remained consistent. https://t.co/MRhD5hgYvE

Nov 9, 2020 · 595 followers View post →
Rafael O. Johnson R.
@Rojohnsonr · X

Cambios en las concentraciones de THC-CBD, a través del tiempo. https://t.co/x6YGRdumMi

Nov 9, 2020 · 2 likes · 348 followers View post →
Bertoglio lab (FMC/UFSC)
@bertogliolab · X

https://t.co/SuCSjYY63s

Nov 9, 2020 · 1,704 followers View post →
Addiction Journal
@AddictionJrnl · X

RT @TheMatilda_USyd: 1/3 Matilda Centre #PhD candidate @Jack_MWilson joined an international team of researchers to conduct a cross-tempora…

Nov 9, 2020 · 15 shares · 15,022 followers View post →
DetroitCannabis
@Dopestofdope313 · X

RT @TheMatilda_USyd: 1/3 Matilda Centre #PhD candidate @Jack_MWilson joined an international team of researchers to conduct a cross-tempora…

Nov 9, 2020 · 15 shares · 358 followers View post →
Madeleine Keaveny
@MaddyKeaveny · X

RT @TheMatilda_USyd: 1/3 Matilda Centre #PhD candidate @Jack_MWilson joined an international team of researchers to conduct a cross-tempora…

Nov 9, 2020 · 15 shares · 206 followers View post →
NCYSUR Epidemiology Group
@ncysur_epi · X

RT @TheMatilda_USyd: 1/3 Matilda Centre #PhD candidate @Jack_MWilson joined an international team of researchers to conduct a cross-tempora…

Nov 9, 2020 · 15 shares · 119 followers View post →
Tara Gückel
@TaraGuckel · X

RT @TheMatilda_USyd: 1/3 Matilda Centre #PhD candidate @Jack_MWilson joined an international team of researchers to conduct a cross-tempora…

Nov 9, 2020 · 15 shares · 538 followers View post →
Society for the Study of Addiction
@SSA_Addiction · X

RT @TheMatilda_USyd: 1/3 Matilda Centre #PhD candidate @Jack_MWilson joined an international team of researchers to conduct a cross-tempora…

Nov 9, 2020 · 15 shares · 8,776 followers View post →
Addiction and Mental Health Group (AIM)
@Bath_AIM · X

RT @TheMatilda_USyd: 1/3 Matilda Centre #PhD candidate @Jack_MWilson joined an international team of researchers to conduct a cross-tempora…

Nov 9, 2020 · 15 shares · 536 followers View post →
Julia Garcia-Fuster
@GarciaFusterLab · X

RT @TheMatilda_USyd: 1/3 Matilda Centre #PhD candidate @Jack_MWilson joined an international team of researchers to conduct a cross-tempora…

Nov 9, 2020 · 15 shares · 544 followers View post →
Scarlett Smout
@ScarlettSmout · X

RT @TheMatilda_USyd: 1/3 Matilda Centre #PhD candidate @Jack_MWilson joined an international team of researchers to conduct a cross-tempora…

Nov 9, 2020 · 15 shares · 597 followers View post →
SystematicReviewBot
@EvidenceRobot · X

RT @TheMatilda_USyd: 1/3 Matilda Centre #PhD candidate @Jack_MWilson joined an international team of researchers to conduct a cross-tempora…

Nov 8, 2020 · 15 shares · 6,718 followers View post →
Sachin Patel
@SachinPatelLab · X

RT @TheMatilda_USyd: 1/3 Matilda Centre #PhD candidate @Jack_MWilson joined an international team of researchers to conduct a cross-tempora…

Nov 8, 2020 · 15 shares · 3,541 followers View post →
Jibran Khokhar
@DrJKhokhar · X

RT @TheMatilda_USyd: 1/3 Matilda Centre #PhD candidate @Jack_MWilson joined an international team of researchers to conduct a cross-tempora…

Nov 8, 2020 · 15 shares · 10,771 followers View post →
The Matilda Centre
@TheMatilda_USyd · X

1/3 Matilda Centre #PhD candidate @Jack_MWilson joined an international team of researchers to conduct a cross-temporal meta-analysis to investigate changes in concentrations of #THC and #CBD in #cannabis over time.

Nov 8, 2020 · 23 likes · 15 shares · 4,800 followers View post →