Smoking Marijuana vs Using a Cannabis Vaporizer

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Cannabis vapor has less tar, but may contain more ammonia. What happens to respiratory symptoms when regular users of joints, blunts, pipes, and bongs switch to a vaporizer?

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In case you missed the previous video, check out Effects of Smoking Marijuana on the Lungs (

Here’s my other cannabis videos that are up so far:
• The Institute of Medicine Report on the Health Effects of Marijuana (
• Researching the Health Effects of Marijuana (
• Is Marijuana Addictive? (
• Does Marijuana Cause Health Problems? (
• Does Marijuana Cause Permanent Brain Damage in Teens? (
• Does Marijuana Cause Permanent Brain Damage in Adults? (
• Will Cannabis Turn into Big Tobacco? (
• Marijuana Legalization and the Opioid Epidemic (

All my future upcoming cannabis videos can be streamed right now for a donation to the 501c3 nonprofit that runs

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-Michael Greger, MD FACLM

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Bilal H says:

Shut the .. up.

David Cazes says:

I'm thinking to switch to vaping because I started caughing and have throat irritation. My aunt also died of lung cancer in her 40s because of smoking so it worries me a lot.

Renzo Fancellu says:

My GF vapes indica wax. It helps her with anxiety disorder, celiac disease. She doesn't drink. Uses a bit recreational I have read so may terrible things about vaping. Im so scared she will have bad respiratory issues or cancer. She thinks the weed will kill and cancer cells produced. She is the love of my life. Im a science teacher and i support legalization. I just dont want to lose the woman i love due to byproducts of the delivery system.

john stape says:

The blue meanie is an old ass piece of shit vape from what i gather on reading old posts about it, apparently users think it was combusting material during use. I'd like to see the ammonia levels when a mighty or volcano is used instead of this ''blue meanie''

Kram says:

The testing only had 20 participants. But I agree, smoke is smoke.

holdinweight says:


A N says:

Do not eat weed
It's really strong
Do not
Believe me
Do not smoke cause it will kill you
So what to do cause I'm depressed?
Plus there is no CBD in our weed
So as it stands I'm screwed .
Can anyone help?

Sovereign Rex says:

vaping is obviously a safer method. You can vape at very low temps. If you care about the negative health effects vape at the lowest possible temp you can or don't use it at all.

Don L says:

Of course! Here i am browsing safari for this topic and wdy know? My boy nutrition facts covered this. Now, whats really interesting are what’s the difference between vaped hash oil (vape pens w glycerine) and vaped dry herb?

Hank Mauro says:

Maybe the study is implying that those 8 didn't improve their 2 existing respiratory issues (which was a pre-requisite to the study), just didn't improve by using a vaporizer. Need more information on the candidates as well.

Zachariah Willburn says:

It’s hard for me to believe that THC is the sole cause of the reduced hippo campus size, with so many pesticides fungicides and molds all on this plant and the lack of standardization in growing in processing such I have a funny feeling it’s not the THC affecting the brain similar to lead but all the other factors involved with the plants constituents. And the vaporising is known to Contain formaldehyde Which Dr. McGregor himself has said causes leukemia

Soy Vdal says:

Why is this so fucking long? Like I’m too high to be watching this slow shit

Kyle Merrifield says:

You don't hold cannabis smoke in. That doesn't get you higher, just makes you light headed from lack of oxygen. I've been a smoker for 9 years now and my lungs have never gave me trouble.

John S says:

It does in fact lower Test levels in men also. if you dont believe me go get tested your levels will be below 320 if you are over 25 years old.

Kēpzī says:

you dont need to hold the smoke of weed… lol

Roberto Longhitano says:

I think you're doing a great job, I'm a diet student and I'd like to know how you're doing a video. Have you would a video showing how you do your research and the procedures to do good research?

mcozy333 says:

as comparison= igniting cannabis plant with fire creates 4000 plus newly formed aromatic hydrocarbons- 4k plus. vaping has shown to create two when the dry plant is vaped @ over 400 degrees F…… even with smoking it and all that noxious smoke the phytocannabinoids in the slip stream provide protective effects. as to effects from cannabis= smoking actually vaporizes the phyto-actives and heat releases them into the pulled heated air… the Lit cinder creates a stable thermal mass that radiates heat that decarboxylates nearby phyto-cannabinoiods and releases them from the plant matter and forms them into an aerosol gas that is super charged

Kael says:

Could you please do a video on CBD oil? I see James Aspey promoting the stuff all the time…

Ethy says:

Smoking a bowl to this

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