January 10th, 2012
05:11 PM ET

Study: Occasional pot smoking not as damaging as cigarettes

Science has shown the dangers of cigarette smoking on lungs– smoking undermines lung function, causes lung cancer and long-term breathing problems such as chronic obstructive pulmonary disease (COPD).  But what about smoking marijuana?

Researchers sought to determine whether exposure to marijuana smoke, which contains many of the same components in cigarette smoke, would also show negative effects on lung function.

They were surprised to find that subjects who occasionally smoked pot – meaning two to three times per month – did not show the same reduced lung function that was seen in cigarette smoking. The study was published in the Journal of the American Medical Association.

Using data from a 20 year study designed to measure heart disease called the Coronary Artery Risk Development in Young Adults (CARDIA) study, researchers analyzed data from more than 5,000 men and women, aged 18 to 30, from four U.S. cities.

Participants from Oakland, Chicago, Minneapolis and Birmingham were repeatedly measured for pulmonary function, height, smoking behavior, and waist circumference and asked about cigarette and marijuana smoking during each assessment.

“There are well known effects of tobacco on pulmonary function and we thought, going into this, that we would find similar types of effects for marijuana,” said lead study author Dr. Mark J. Pletcher of the University of California, San Francisco.

As expected, his team found among cigarette smokers, the more smoke a subject was exposed to, the more adverse effects they had in lung function. Lung function was measured with spirometry testing, which shows the amount of air a person can forcibly exhale, giving  doctors a measure of how well the lungs are functioning.

But Pletcher notes that his team was surprised to find that subjects who smoked limited amounts of marijuana actually were able to blow large volumes of air into the spirometer. 

“People who smoke marijuana inhale very deeply, which may strengthen the muscles used for inhalation – basically making them good at the test. So even though it’s a very statistically significant result, it probably doesn’t have any physiologic meaning in terms of function,” he explained. 

Subjects who smoked larger amounts of marijuana, which Pletcher described as smoking one joint per day, did show evidence of reduced pulmonary function, and he stressed that his study results are not intended to encourage people to use marijuana. 

However, for patients for whom medical marijuana may be a treatment option, the authors write that "marijuana may have beneficial effects on pain control, appetite, mood, and management of other chronic symptoms.  Our findings suggest that occasional use of marijuana for these or other purposes may not be associated with adverse consequences on pulmonary function.  It is much more difficult to estimate the potential effects of regular heavy use... our findings do suggest an accelerated decline in pulmonary function with heavy use."

It’s important to note that the findings of this study are not meant to encourage marijuana smoking, nor did the study examine other known negative effects of marijuana use, which include problems with memory, concentration and perception.

Marijuana is the most commonly used illegal drug in the United States, according to the National Institute on Drug Abuse. Long term use of marijuana can lead to addiction, and chronic marijuana use is associated with mental health problems including anxiety and depression. Studies have shown that when marijuana use begins at a younger age, it may increase mental health problems, including psychosis, according to NIDA.

soundoff (680 Responses)
  1. Jake

    I love how these studies all have to say that this "is not intended to encourage use" because they don't find largely negative impacts. One study a few months back was ordered by the LA City Attorney to be removed from the web or face a major lawsuit.

    "Facts are stubborn things" John Adams, 2nd US president of the United States.

    January 10, 2012 at 17:24 | Report abuse | Reply
    • Btx

      John Adams was real big on something called the Alien and Sedition Acts, hint, hint

      January 11, 2012 at 00:10 | Report abuse |
    • neoritter

      Facts are stubborn things.

      They noted a potential reason to better test results for marijuana users that was not tied to the drug itself, but rather its usage; and they noted that heavy use shows an accelerated decline in pulmonary function. Obviously they wouldn't want to encourage use. If one joint per day decreases pulmonary function then it's probably a good idea to not suggest more than occasional use.

      January 11, 2012 at 08:24 | Report abuse |
    • ananur forma

      they don't mention that if it's been sprayed with pesticides it's hazardous and if it's grown in natural conditions and cared for by someone who knows what he or she is doing the effects are not harmful. the pesticides are problematic. which is why I quit years ago.

      January 11, 2012 at 08:39 | Report abuse |
    • HRPufnstuf

      Did they compare it to smokers who only smoke "two or three cigarettes per month?" Of course not, as there are no such smokers. And probably dang few marijuana smokers who only settle for two or three per month.

      Sucking hot burning smoke and ashes, of ANY kind down your throat can't be good for your lungs, no matter what the fuel source.

      January 11, 2012 at 08:44 | Report abuse |
    • bczu

      HRP, they were doing it to show that people who use it medically (2-3 times a month) Can use it without any adverse effects. by the way, can you make tobacco cookies and brownies? Nope! But you can make pot brownies, use a vaporizer etc And they have no carcinogens that way. Oh and how many people die every year from liver failure from alcohol? What medicinal uses does alcohol have?

      January 11, 2012 at 09:30 | Report abuse |
    • neoritter

      You a haven't been to a doctor's office much have you?

      January 11, 2012 at 09:44 | Report abuse |
  2. 333maxwell

    The headline smacks of yellow journalism and harkens back to a dark era in our press's past when the press deliberately skewed marijuana into being demonized in the first place.

    Cigarettes? C'mon CNN.. no other news source on this story correlates the study as a cig's vs cannabis ordeal. Anyone with a brain knows Cannabis doesn't cause the harm of cigarettes because cannabis doesn't kill 5.5 million people a year like tobacco does.. I mean get a grip.

    January 10, 2012 at 17:33 | Report abuse | Reply
    • neoritter

      That made no sense. What was your point again?

      January 11, 2012 at 08:25 | Report abuse |
    • Brad

      How do you know that? I mean, I know from personal experience that a lot of people that smoke pot also smoke cigs. I also know people that only smoke pot, but very heavily, and they have a bad cough like a lot of smokers. I'm all for legalizing pot, but lets not sugar coat it. You are inhaling smoke in concentrated forms. No matter how you spin it, that is bad for your lungs.

      January 11, 2012 at 08:31 | Report abuse |
    • Rags

      Don't you think that's because tobacco is more widely used than marijuana?

      January 11, 2012 at 08:37 | Report abuse |
    • Cobra212

      How can this even be a scientific study. They state that "users who occasionally smoked pot – meaning two to three times a month"... so how many pot users only smoke two to three times a month and how many cigarette smokers only smoke two to three times a month? Last I checked, an occasional cigarette smoker was lucky if they only smoked 2-3 cigarettes a day. So how does one compare apples and oranges and come up with anything other than apples are not oranges? This type of study is not only misleading because of the way it was conducted, but dangerous because it puts the information out, not to educate, but rather to try to convince people of the safety of something that isn't safe. Putting anything other than air into one's lungs over a period of time is detrimental to one's health. People can make decisions for themselves when given the real facts, the trouble is that people with money and power only give us the facts they want to in order to try to control the decisions we make. If you use your common sense you can see through these farces.

      January 11, 2012 at 08:48 | Report abuse |
    • Hugo

      How is it yellow journalism? The press reports all sorts of studies on a fairly regular basis. How is this behavior different than the mainstream?

      January 11, 2012 at 09:00 | Report abuse |
  3. Emperor Norton

    Like every pothead in this hemisphere didn't know this already.

    January 10, 2012 at 18:32 | Report abuse | Reply
  4. rgreeniwa

    Or, Study: Occasional pot smoking not as damaging as a car wreck

    January 10, 2012 at 18:54 | Report abuse | Reply
    • JD

      Maybe it cased the car wreck.

      January 11, 2012 at 08:20 | Report abuse |
  5. Marty

    Making Pot butter & using it in foods is the best of two worlds. You can have the advantage of the pot as a med & not get the harm of the smoke...

    January 10, 2012 at 21:19 | Report abuse | Reply
    • Lori

      waiting with baited breath to hear what we should and should not do...meanwhile in my backyard, grows the only pain relief I am not allergic to (risk of 3rd anaphalatic reaction).
      Yours truly,
      A Breast Cancer Survivor and Lupus sufferer (side effect from the radiation treatment)

      ps Support your Local economy and not Mexico's drug cartel, plz.

      January 11, 2012 at 09:15 | Report abuse |
    • Alex

      Also very expensive =/

      January 11, 2012 at 09:35 | Report abuse |
  6. muzzylu

    It is much safer to smoke marijuana than tobacco, but if you use edible cannabis products it is even better, and it can relieve pain.
    Great e-book on medical marijuana: MARIJUANA – Guide to Buying, Growing, Harvesting, and Making Medical Marijuana Oil and Delicious Candies to Treat Pain and Ailments by Mary Bendis, Second Edition. This book has great recipes for easy marijuana oil, delicious Cannabis Chocolates, and tasty Dragon Teeth Mints. goo.gl/iYjPn goo.gl/Jfs61

    January 11, 2012 at 04:24 | Report abuse | Reply
  7. Mary J Money

    Don't smoke it, eat it 🙂 problem solved.

    January 11, 2012 at 08:03 | Report abuse | Reply
    • Epidi

      Sifted to get the seeds & stems out – bake in brownies. Or, use as an herb, to flavor sauces, etc. Simple recipes, lol.

      January 11, 2012 at 09:17 | Report abuse |
  8. Katie

    Yeah, this is news.. NOT!!!

    January 11, 2012 at 08:05 | Report abuse | Reply
    • Jerome

      Uh-oh, the news police are back.

      January 11, 2012 at 09:00 | Report abuse |
  9. theybetrippenyo

    My lung exploded on me without any sort of smoking. Never smoke, never drank, never did drugs. One of the FEW ways in the early days of recovering from my embolism I was able to control the pain was through pot brownies. No smoke, and better then the best painkiller they could have given me. Relaxed me, stopped any panic I had and made the pain bearable.

    People need to realize that demonizing a drug like this, only winds up hurting the people that need it the most.

    January 11, 2012 at 08:08 | Report abuse | Reply
  10. hillbillynwv

    Weed was put on this earth for us to enjoy !.......Legalize it !

    January 11, 2012 at 08:08 | Report abuse | Reply
    • JD

      Exercise reduces stress like weed does you ever try that?

      January 11, 2012 at 08:40 | Report abuse |
    • bczu

      JD, you ever try minding your own business? Its a great stress reliever.....

      January 11, 2012 at 09:32 | Report abuse |
  11. Jim in Texas

    This is either badly reported, written, or perhaps just poorly conducted science. I see no one-to-one comparison between the two types of smoke inhaled. To say that a person who occasionally smokes marijuana doesn't suffer the same lung function loss as a cigarette smoker doesn't much address the question of who's inhaling more smoke. "subjects who occasionally smoked pot – meaning two to three times per month – did not show the same reduced lung function that was seen in cigarette smoking." How much cigarette smoking? People who are addicted to nicotine tend not to be "occasional" smokers. Even a mild cigarette habit can amount to 10 to 15 cigarettes a day. I guarantee the people in this study weren't smoking 10 to 15 joints a day! Apples and oranges science here, I think.

    January 11, 2012 at 08:20 | Report abuse | Reply
    • Troy

      Totally agree, the way this was conducted was anything but scientific. This has about as much information as saying smoking three cigarettes a month is better for you than chain smoking.

      I believe that marijuana is better for you lungs, fewer chemicals and all, but this study doesn't prove that theory.

      January 11, 2012 at 08:26 | Report abuse |
    • JD

      Inhaling smoke of any kind reduce your blood oxygen levels. Which is a lung function. It reduces that. Do you not understand? Smoking anything is not healthy for you. You should not smoke anything at all. Saying that weed is better than cigs is wrong. In both instances you get a sense of relief. Whether it is from your nicotine craving or getting high. Part of the reason why you get high is because if your reduced blood oxygen levels.

      January 11, 2012 at 08:28 | Report abuse |
    • someone with a brain

      meanwhile, in Texas

      January 11, 2012 at 08:29 | Report abuse |
    • Frank

      This is exactly what I was thinking, what does a study with such a ridiculous comparison hope to prove? I'd be more interested to see test results showing what you possibly could smoke twice a month that would be worse for your lungs than a cigarette habit.

      January 11, 2012 at 08:42 | Report abuse |
    • Jon

      You stole the words out of my mouth. They would be hard pressed to find anyone who only smokes 2 to 3 cigarrettes a month to make an actual comparison. What a worthless article.

      January 11, 2012 at 08:46 | Report abuse |
    • Lori

      for JD: you are right. The carbon monoxide from any Smoke reduces the oxygen level capacity by binding to the hemoglobin molucule instead of oxygen. A temporary effect. What does Advil do to the liver cells? Kills them every time. Asprinin – look at the PDR (Physcian Desk Reference) to find ALL the known effects and possible side-effects. Inhaling car exhust fumes from driving in traffic, shouldn't being doing that either. Eat too much cheese? ok, you get my point. Moderation balances the illl-effects of living, because in the end, we are all just dying as we sit and type on CNN. So...my point is, to say you shouldn't smoke pot, is like saying, you should live in a vacuum. Which would lead to psychosis, also. Live your life, I'll live mine. And I promise, I will not tell you what you should and should not do.

      January 11, 2012 at 08:56 | Report abuse |
    • bczu

      Great post Lori

      January 11, 2012 at 09:33 | Report abuse |
    • neoritter

      "Live your life, I'll live mine. And I promise, I will not tell you what you should and should not do."

      Speaking of living in vacuums... Your life affects people around you. You can't just live your life and I live mine. It's a stupid statement. Grow up a little bit and realize there's more to life than just you.

      January 11, 2012 at 09:55 | Report abuse |
    • bczu

      Neoritter, so how has me smoking marijuana effected you?

      January 11, 2012 at 10:41 | Report abuse |
    • Lori

      CNN will not let me reply.

      January 11, 2012 at 11:47 | Report abuse |
    • neoritter

      I worry about you bczu. That inability to respond and discuss things logically must be attributed to your marijuana use.

      January 12, 2012 at 08:04 | Report abuse |
  12. Troy

    Why is this an illegal substance? And are there any other naturally occurring plants that it is illegal to smoke?

    January 11, 2012 at 08:21 | Report abuse | Reply
    • neoritter


      January 11, 2012 at 08:25 | Report abuse |
    • I'mwithyou

      The poppy plant, from which opiates such as heroin are produced, is a naturally growing plant that has been "outlawed."

      January 11, 2012 at 08:36 | Report abuse |
    • Brian

      The ease of creating it gets in the way of Big Pharma's (and FDA's) agenda.

      January 11, 2012 at 08:38 | Report abuse |
    • caruck

      Tobacco...if you are under age

      January 11, 2012 at 08:45 | Report abuse |
    • bczu

      You guys ever see what they have to do and add to the poppy plant to make heroin or even making cocaine? Know what you have to do to a pot plant? Dry it...

      January 11, 2012 at 09:35 | Report abuse |
    • neoritter

      I was asked for a plant that was illegal to smoke. Poppy would be one. Coca is also another one.

      January 11, 2012 at 09:49 | Report abuse |
    • la

      Exactly what I was thinking bczu

      January 11, 2012 at 09:51 | Report abuse |
  13. David

    When marijuana use starts at a young age it may cause psychosis? I didn't know that.

    Is that what happened to today's members of the GOP?

    January 11, 2012 at 08:22 | Report abuse | Reply
    • Paulie

      Yeah because the GOP is a bunch of pot smoking hippies not liberals. LOOL way to not get it.

      January 11, 2012 at 08:27 | Report abuse |
    • David

      That's a good point, Paulie. Thank you.

      So what you're saying is that pot use might actually improve brain function?

      January 11, 2012 at 08:46 | Report abuse |
    • Jack

      As one who travels in the GOP circles of corporate America, I think you'd be surprised Paulie. Hippies, no, but they don't have a monopoly on pot use.

      January 11, 2012 at 09:04 | Report abuse |
    • james

      I saw that on canadian tv...ya know what, those people were nuts to begin with, every one of them. nuts. trying to blame it on weed again....it won't work.

      January 11, 2012 at 09:13 | Report abuse |
  14. Xanadu

    Life is hazardous to your health.

    January 11, 2012 at 08:23 | Report abuse | Reply
    • JD

      Choice is hazardous for your health.

      January 11, 2012 at 08:29 | Report abuse |
  15. Badley-Bent

    Undoubtedly, some zealot in government will just have to find a way to refute this finding!

    January 11, 2012 at 08:26 | Report abuse | Reply
  16. willing guinea pig

    hey man next time notify me of the study, i'll gladly be a test subject!

    January 11, 2012 at 08:26 | Report abuse | Reply
  17. Really Jersey

    A pot smoker who only smoked just 1 a day had reduced pulmonary function. Wow! That agrees with another study that found more particulate matter was retained in pot smoker's lungs than in cigarette smoker's lungs because they breathed in more deeply & held their breath during smoking. I think I would want to expand my breathing capacity in a healthier way, like holding your breath while swimming underwater. That has proven benefits for asthmatics, & doesn't leave cr@p in your lungs to cause cancer.

    January 11, 2012 at 08:27 | Report abuse | Reply
    • bczu

      Im happy you made your decision. Ive made mine. Now mind your own business while I sit in my own house and enjoy life. You keep running around worrying about what others are doing.

      January 11, 2012 at 09:36 | Report abuse |
  18. docdewitt

    Hold th phone; common sense tells us that pot smokers do not use filters, and that unfiltered smoke is about seven times as damaging as filtered. Nice try. Be as much of a pot head as you like, but each joint is like 7 or so ciggies...

    January 11, 2012 at 08:27 | Report abuse | Reply
    • BOB

      people like you scare me talk about somting you know nothing about

      January 11, 2012 at 08:42 | Report abuse |
    • BigDaddy

      My goodness don't you get uit? Are you that ignorant or are you just missinformed.The lies about Cannabis is finally coming to a head.Zero deaths from its use in the history of man.There are more deaths from OTC drugs than pot.The US has said for years that pot smoke was equivelent to 8 ciggys..so where are these cancer patients from pot use? Where are they? There arent any because the US has known since 1974 that pot has anti-cancer properties.Lying liars and the lies they tell is most certainly about our Government.It is sad that it cannot be trusted to do the right thing and be truthful in doing so.Dont add to the BS and be real.Legalize cannabis for all adults.The time is ripe as the lies are being exposed every day.It won't be long now....

      January 11, 2012 at 08:43 | Report abuse |
    • Really Jersey

      You have never seen a person with mental illness triggered early by pot then BigDaddy. I have, up close. I've still got scars on my arms where I was bitten while restraining the guy from killing his sister. Caught him pounding her head on the floor. He fractured her skull. She lives in a nursing home dude. There are lots of murder cases where pot played a role in the killer's development of mental illness. I have a kid with a degree in criminal justice & I have read some of the course books. You are trying to believe a drug does not have negative side effects. ALL drugs have negative side effects, grow up.

      January 11, 2012 at 09:47 | Report abuse |
    • la

      ReallyJersey – did you know that other drugs like PCP and other mind-altering drugs can be added to marijuana? Because regular marijuana does not do that to people. This is why it needs to be legalized and regulated. Don't talk about absolutes if you have never tried marijuana yourself. And your post is confusing – did he kill his sister or is she in a nursing home or was she in the nursing home when he killed her?

      January 11, 2012 at 09:56 | Report abuse |
    • Joey

      In other news fire is indeed hot.....

      December 9, 2013 at 10:27 | Report abuse |
  19. BOB

    pot is like boz it has a diffrent effect on diffrent people bottom line here is i know 10 or12 millionairs who smoked pot from age 15 to age 70 some still smoke clam it keeps alzheimers from setting in damn that would be hard for the medical people to except pot helps alzheimers

    January 11, 2012 at 08:29 | Report abuse | Reply
    • james

      I'm 44 and been smoking since I was 11. I had the flu maybe, maybe twice in my life. I run 2 to 5 miles 3 times a week. I have two degrees. Never been hospitalized for any reason. IT IS NOT BAD FOR YOU, THERE ARE TOO MANY HYPOCRITES IN THE WORLD.

      January 11, 2012 at 09:10 | Report abuse |
    • Really Jersey

      I just watched my nephew bury his Dad who did not reach 65. Emphysema.

      January 11, 2012 at 09:51 | Report abuse |
    • la

      And did he get emphysema from smoking marijuana???

      January 11, 2012 at 09:57 | Report abuse |
  20. david

    So if you only smoke 2-3 joints a month its ok.... Now you need to do a study on smoking 2-3 cigarettes a month and if cigarettes cause more damage this story would mean something. But since you compared 2-3 joints to an unknown number of cigarettes, while stating that the more you smoke the more it will affect your lungs, your study is inaccurate. Unless you compare an equal number for both this study is garbage, you also need to show the effect on the brain to accurately measure damage…. not just lungs.

    January 11, 2012 at 08:30 | Report abuse | Reply
  21. lieslmareth

    So people who smoke two or three times a month have less lung damage than people who smoke upwards of two or three times a day? I'm glad they spent all that money to figure that out.

    January 11, 2012 at 08:32 | Report abuse | Reply
  22. lloyd roberts

    Love the last paragraph by the NIDA, that CNN just had to put in there talking about all the supposed evils of marijuana. Even yesterdays article on binge drinking in America didn't finish with a litany of the evils of alcohol at the end of the article. And that article was negative about alcohol and this article somewhat positive about marijuana. Remember who advertises on CNN and other media and remember who governs CNN and the rest of the media. Don't want to "P" off your sponsors with the truth now. Ya betchya

    January 11, 2012 at 08:32 | Report abuse | Reply
    • Dorothy

      I agree. I am surprised most people are overlooking the last paragraph in all its scare tactics and wrong information. Maybe most are not reading the whole article? There has never been proof it's addictive. Never.

      January 11, 2012 at 09:02 | Report abuse |
    • Lori

      I wrote pseudocode for NIDA drug's testing panels. Never met such psychotic controlling freaks as on that job assignement. As soon as I finished, in the NIDA parking lot, I fired one up, in the rental they paid for – headed for the airport -home to Oregon.
      NIDA leads to pychosis, just talk to any of the employees, from the Medical Director down to the lowest technician. Unbearable.
      Coincendence? I don't think so, I've worked in various clinical labs for 30 years, and while they are all filled with perfect misfits, NIDA trumped them all.

      January 11, 2012 at 09:22 | Report abuse |
  23. Brian

    OTC drugs kill more people than all illegal drugs combined. Also, look at the damage alcohol brings. MJ is probably the safest and most effective of all.

    January 11, 2012 at 08:36 | Report abuse | Reply
  24. Shawn

    The people who did this study must have been high!

    January 11, 2012 at 08:38 | Report abuse | Reply
  25. A.I.

    Just make some ganja butter and you don't have to smoke it, or get a vaporizer.

    January 11, 2012 at 08:39 | Report abuse | Reply
  26. TODAY


    January 11, 2012 at 08:40 | Report abuse | Reply
  27. Rags

    I will never understand why some feel the need to damage their bodies in any manner. Smoke? Why not stick your head into a potbellied stove and breath deeply or get up on the roof and stick your head down the chimney while a raging fire is burning in the fireplace. You'd be 'high' in more ways than one.

    January 11, 2012 at 08:41 | Report abuse | Reply
    • Lori

      do you ever take asprin? drink a beer? have a lazy day? of course not, YOU never damage your body in any way, therefore you can tell the rest of us what idiots we are for living our lives as we see fit. Walk on water my friend.

      January 11, 2012 at 09:26 | Report abuse |
  28. VaporLung


    Medibles and Vaporizers are a much less harmful solution.

    Be wise and Vaporize!

    January 11, 2012 at 08:41 | Report abuse | Reply


    January 11, 2012 at 08:44 | Report abuse | Reply
  30. Tim

    Hmmmmmm. Smoking pot 3-4 times per month isn't as bad for you lungs as you DAILY habit of cigarettes? Shocking. CNN, your grasp of the obvious is AMAZING!

    January 11, 2012 at 08:44 | Report abuse | Reply
  31. richardbrody

    wow man, what a great article......what was that article about, anyhow, I just can't seem to remember.

    January 11, 2012 at 08:50 | Report abuse | Reply
  32. Justin

    Wait a minute...they needed a study to figure out that smoking something 2-3 times a month isn't as harmful as a daily smoking habit?

    January 11, 2012 at 08:51 | Report abuse | Reply
  33. Quid Malmborg in Plano TX


    January 11, 2012 at 08:51 | Report abuse | Reply
  34. james

    It must be ok to make money for the government now. When they want to roll out a new tax, they can just make that legal too. Everybody wants it legal to tax, just like they rape you on cigarettes.

    January 11, 2012 at 08:53 | Report abuse | Reply
  35. Zach Harper

    So why is something that "may" be harmful, but is clearly significantly less harmful than cigarettes on your lungs, illegal? Even things like junk food and lack of exercise are more harmful than smoking marijuana. That's not even mentioning how bad alcohol is for your health. Why does the government get to chose our lifestyles? There aren't laws making us exercise or eat healthy, why are there laws against something that maybe causes damage to our lungs at worst?

    January 11, 2012 at 08:56 | Report abuse | Reply
  36. Don

    It would be just as accurate to change the headline to
    "Occasional cigarette smoking not as dangerous as daily cigarettes."

    "They were surprised to find that subjects who occasionally smoked pot – meaning two to three times per month – did not show the same reduced lung function that was seen in cigarette smoking."

    That suprised them? The regular cigarette smoker does many times that much in a week! Of course there will be a difference! What were these people smoking?

    January 11, 2012 at 08:57 | Report abuse | Reply
  37. olkvgn

    Two to three times a month? WHy bother?

    January 11, 2012 at 08:58 | Report abuse | Reply
  38. herecomethepotheads

    now we get to hear all the ranting from the pot heads!

    January 11, 2012 at 09:01 | Report abuse | Reply
    • james

      They are your fellow Americans, now go have a drink and cool off.

      January 11, 2012 at 09:04 | Report abuse |
    • ksea

      now we get to hear from all the judemental people like you. worry about yourself, nobody hassles you!!

      January 11, 2012 at 09:27 | Report abuse |
    • bczu

      How's it feel to be a pawn of big business?

      January 11, 2012 at 09:42 | Report abuse |
  39. vaporizer

    Eat, Vape


    January 11, 2012 at 09:01 | Report abuse | Reply
  40. Lilscony

    We need to Tbow the law on marijuana. It seems to do more good than bad, so I say, make it legal then tax it to help with the economy or continue to spend millions to fight the trafficing of it.

    January 11, 2012 at 09:01 | Report abuse | Reply
    • james

      Go google the Rick Simpson Oil...you'll find out why it's illegal.

      January 11, 2012 at 09:02 | Report abuse |
  41. james

    I swear, these twits they have running this cartoon news network, they think "Put a pretty face out there, and the Cattle will believe anything"...these people suck, I don't want to hear their opinion, they don't give facts anymore. They just give commentary on what they think is happening.

    January 11, 2012 at 09:01 | Report abuse | Reply
  42. T.j

    Maybe they should test the effects of vaporized cannabis against cigarettes and compare the damage. I'm assuming the main ingestion method was a joint and with so many ways to consume cannabis they should have tested more such as water filtration and tinctures.

    I still don't get why cigarettes are legal and kill millions, yet cannabis is illegal because back in the 20's and 30's it was claimed it would cause you to go insane or that it made white women lust after black men.

    January 11, 2012 at 09:02 | Report abuse | Reply
  43. Idiots

    The primary purpose of this study was to see if there were negative effects for those who use marijuana for medical purposes, not to compare to those who smoke cigarettes.

    January 11, 2012 at 09:04 | Report abuse | Reply
  44. jason

    marijuana has medicinal value, they arent kidding anybody with this hit piece.

    January 11, 2012 at 09:06 | Report abuse | Reply
  45. Brian

    Just use a vaporizer. Very little smoke is involved. Or, put it in your food in the form of hash. No smoke at all.

    January 11, 2012 at 09:06 | Report abuse | Reply
  46. james

    It's funny how this Bar owner here in Michigan tried to get a corner on the "High" market and start a dispensary right across the street from their bar. Where all the cops hang out off duty. They let that guy have a dispensary, but nobody else in town could.

    January 11, 2012 at 09:07 | Report abuse | Reply
  47. Ivan

    I'm tired of pot smokers justifying their habit. If you smoke anything of anything, it's going to cause lung damage. Simple as that. With that being said, I'm going to go pack a bowl.

    January 11, 2012 at 09:11 | Report abuse | Reply
  48. dale

    I'm 62–been smoking pot for over 40 years–never been arrested for anything in my life–I have 6 children, all grown, and 10 grandchildren (nothing wrong with the sperm count) and none of them have ever been in jail for anything. My cognitive function doesn't seem to have been compromised, since my doctoral exams and my dissertation went very well, as did my years of college-level teaching. Now that I'm retired, I work hard to keep my body and mind in good shape–at least 2 crossword puzzles a day (my record: 6 minutes), read several books a week, play music every day (several different instruments), and work out every day, and I use a vaporizer as my thc uptake system (no smoke). My doc says I'm in great health. Now, of course, such anecdotal evidence is not proof of anything, but I feel like most reporting on marijuana uses scare tactics and implies terrible results from smoking that are no more valid than my one example. I believe in moderation in all things, even moderation.

    January 11, 2012 at 09:11 | Report abuse | Reply
    • BigDaddy

      God Bless you Dale.You are another amongst thousands who have used cannabis for years and still "made it".If more folks like you were to join forces with Mpp and NORML,cannabis would be on the path to true legalization and regulation.Thank you brother...bigD

      January 11, 2012 at 10:29 | Report abuse |
  49. anthony

    man made booze god made weed who do you trust

    January 11, 2012 at 09:11 | Report abuse | Reply
  50. Phil

    Activists have been saying this for years. Also, there is an option to "vaporize" the herb, thus further eliminating any adverse effects while at the same time maximizing the benefits. Cannabis is the wonder plant, and is finally being seen as such by the masses.

    January 11, 2012 at 09:12 | Report abuse | Reply
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