09/11/26

Where are we with understanding the health effects of cannabis?

When states began legalizing recreational cannabis a couple decades ago, 25 million Americans said they used the drug. That number nearly tripled to 70 million by 2023.

There are a lot of open questions about how it affects us. Why do some people find more pain relief from THC than traditional painkillers? Is it really better for sleep? What are the effects of long-term use?

Host Flora Lichtman is joined by two scientists taking on these kinds of questions: Experimental psychologist Ryan Vandrey, who’s studied the health effects of cannabis for 26 years, and neuropsychologist Natasha Wade, who studies the effects of substance abuse on adolescent brains. She recently analyzed data from 11,000 teens to understand how cannabis affects development.


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Segment Guests

Ryan Vandrey

Dr. Ryan Vandrey is an experimental psychologist and professor at the Johns Hopkins University Behavioral Pharmacology Research Unit and helps lead the Johns Hopkins Cannabis Science Lab.

Natasha Wade

Dr. Natasha Wade is an associate professor in the Department of Psychiatry at UC San Diego and licensed clinical neuropsychologist.

Segment Transcript

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Meet the Producers and Host

About Flora Lichtman

Flora Lichtman is a host of Science Friday. In a previous life, she lived on a research ship where apertivi were served on the top deck, hoisted there via pulley by the ship’s chef.

About Dee Peterschmidt

Dee Peterschmidt is Science Friday’s audio production manager, hosted the podcast Universe of Art, and composes music for Science Friday’s podcasts. Their D&D character is a clumsy bard named Chip Chap Chopman.

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