As more states continue to legalize recreational and medicinal marijuana, questions concerning the health risks associated with the substance and its various consumption methods are on the rise.
For example, what are the effects of vaporizing marijuana versus smoking it? Although limited research currently exists, there is some data and anecdotal evidence that can offer a look into the health risks, or lack thereof, associated with these two popular methods.
Smoking marijuana releases tar and carcinogens into the body
Smoking marijuana releases carcinogens — substances or environmental factors that may lead to cancer— into the body. That’s because cannabis, the plant marijuana is derived from, is like any other plant, according to Dr. Jeffrey Chen, the director of the UCLA Cannabis Research Initiative. “When you combust any plant, you’re creating significantly more carcinogens,” Chen said.
Some people who switched from smoking weed to vaping it have noticed improvements in their lung health. AP Photo/Esteban Felix
Smoking marijuana also releases tar into the body. In fact, the American Lung Association noted that marijuana smokers have “greater exposure per breath to tar,” than cigarette smokers, since they typically inhale for longer.
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That said, Chen told INSIDER that some people who switched from smoking weed to vaping it have noticed improvements in their lung health and experience less bronchitis. In fact, a 2007 study in the Harm Reduction Journal found that vaporizing marijuana can reduce respiratory issues caused by smoking marijuana through a pipe, bong, or other combustible method. More research on the long-term effects of weed vaporizers still must be done, though, to ascertain this claim.
Your choice of vape method determines safety
There is one major caveat when it comes to the benefits of vaping marijuana, and it comes down to whether you use a traditional vaporizer or a vape pen. While smoking the substance through a pipe, bong, or other methods may release more marijuana-based toxins than vaping, pens can also introduce dangerous carcinogens to a person’s body, Chen explained.
That’s because the current vape pens being sold in smoke shops and dispensaries aren’t the same thing as traditional vaporizers. To use a traditional vaporizer, a person puts dried marijuana flower into the vape’s chamber and then heats it as if it were in a convection oven. The resulting vapor from the heated flower is what gets a person high.
Vape pens might expose users to harmful toxins
Vape pens typically use marijuana extracts in the form of liquid-filled cartridges that are attached to the pen and then inhaled. This means smokers are inhaling concentrated contaminants and carcinogens that go directly into the bloodstream.
marijuana vaporizer vaping vape
A carrier agent is sometimes added to a marijuana extract so it heats and burns more smoothly through the vape pen. Eduardo Munoz/Reuters
These contaminants are introduced to a vape pen when the weed is grown and the extract is created and packaged. According to Chen, pesticides, fertilizers, and even heavy metals may touch a cannabis plant in the growing process. While these toxins can also affect a person smoking marijuana through a pipe or bong, vape pen users could be exposed to an especially concentrated form.
Additionally, the process used to turn marijuana into an extract uses special solvents that aren’t always safe for the body, Chen said. “Butane or hexane are bad and might remain in the extract,” he told INSIDER. “They try to remove them, but sometimes there is some left over [in the extract].”
A carrier agent may also be added to a marijuana extract so it heats and burns more smoothly through the vape pen. These carrier agents, like glycerin, also contain carcinogens and, according to Chec, “at high temperatures, these contaminants can turn into even more harmful things.”