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Category Archives: Potency

High-Potency Cannabis Linked to Brain Damage, Experts Warn

High-Potency Cannabis Linked to Brain Damage, Experts Warn

by Liam Davenport
Medscape Psychiatry & Mental Health, December 15, 2015

WTR-RI Research & Analysis Team Comment:

This study, Effect of high-potency cannabis on corpus callosum microstructure was conducted by Silvia Rigucci, MD, Department of Neurosciences, Mental Health and Sensory Organs, Sapienza University of Rome, Italy in collaboration with colleagues at the Department of Psychosis Studies, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, UK.

Results indicate that regular use of today’s high potency strains of marijuana “is associated with disturbed callosal microstructure organization in individuals with and without psychosis”. (see abstract at http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=10044996&fulltextType=RA&fileId=S0033291715002342)

As the Medscape summary article notes, “Smoking high-potency, or “skunk”-like, cannabis may cause white matter damage in the corpus callosum, thus interfering with communication between the right and left hemispheres of the brain …” (see summary at article at http://www.medscape.com/viewarticle/855971?nlid=93987_2051&src=wnl_edit_medn_psyc&uac=238333HT&spon=12&impID=924712&faf=1#vp_1).


Identifying teens at risk for hashish use

Identifying teens at risk for hashish use

New York University. (2015, April 13). Identifying teens at risk for hashish use. ScienceDaily. Retrieved April 14, 2015 from http://www.sciencedaily.com/releases/2015/04/150413091645.htm
ScienceDaily Summary:
One in ten high school seniors has used hashish, a highly potent form of marijuana. Teens self-described as “hooked” on pot were twice as likely to use hashish.
Journal Reference:
Joseph J. Palamar, Lily Lee, Michael Weitzman. Prevalence and correlates of hashish use in a national sample of high school seniors in the United StatesThe American Journal of Drug and Alcohol Abuse, 2015; 1 DOI: 10.3109/00952990.2015.1011745

Legalizing marijuana and the new science of weed

Legalizing marijuana and the new science of weed

American Chemical Society (ACS). (2015, March 23). Legalizing marijuana and the new science of weed. ScienceDaily. Retrieved March 25, 2015 from http://www.sciencedaily.com/releases/2015/03/150323075237.htm
Science Daily Summary:
More than a year into Colorado’s experiment legalizing marijuana, labs testing the plants are able for the first time to take stock of the drug’s potency and contaminants – and openly paint a picture of what’s in today’s weed. Now, one such lab will present trends — and some surprises — that its preliminary testing has revealed about the marijuana now on the market. Scientists are studying potency, amounts of a substance called CBD and contaminants in the products.
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