Researchers used a smoking machine to test the intensity of marijuana rolled into joints
If you want to get very high quickly, you might think smoking cannabis with the greatest possible concentration of cannabinoids—such as the plant’s main intoxicating ingredient tetrahydrocannabinol, or THC—is the best way to go. But new research suggests this is not so simple. Using a smoking machine to test the intensity of individual marijuana joints, researchers now find that how much active ingredient gets from such a cigarette to your mouth depends largely on how the joint is engineered.
A joint is a simple device: the wrapping paper both holds the ground-up cannabis plant and channels smoke from the burning tip to the user’s mouth. Burning releases cannabinoid compounds from the plant particles in a gaseous form, allowing a smoker to draw them through the loosely packed material. Think of it as extracting and delivering gas-phase compounds at opposite ends of a tube. “This is an aerosol transmission problem at the interface between the joint and your mouth,” Roggen says.
Surprisingly, while the THC-dominant joints delivered a total of 19 to 28 milligrams of THC per cigarette, the CBD-dominant versions each delivered a whopping 90 to 100 mg of CBD—that’s 200 to 400 percent more of the dominant cannabinoid. “The amount of cannabinoid that gets to your mouth is higher for CBD than for THC,” Roggen says. “I cannot explain it, but I am very intrigued.”
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