Smoking Cannabis and Lung Cancer

Image Credit: Image Credit: miggslives / Flickr

How can you believe in any scientific study?

How can we believe in any study? It seems they can always refute each other.

Veguyan / Originally asked on Cannabis Receptors & Food

Answer:

Thank you for bringing up this important larger point. What does one do in the face of conflicting evidence? The answer is to look at the balance of evidence and ask yourself before making any decision “What does the best available evidence show right now?” Unfortunately, sometimes the media fails to put new study results in context and so you get this kind of intellectual whiplash back and forth.

In terms of the purported link between smoking cannabis and lung cancer, although doubts have been raised, the latest review continues to raise strong concerns, so better to take the dietary approach I suggest in Cannabis Receptors & Food. As I said in The Healthiest Vegetables, it seems smoke inhalation is not good for your lungs, whether from a burning building or bogie.

Image Credit: miggslives / Flickr

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Michael Greger M.D., FACLM

Michael Greger, M.D. FACLM, is a physician, New York Times bestselling author, and internationally recognized professional speaker on a number of important public health issues. Dr. Greger has lectured at the Conference on World Affairs, the National Institutes of Health, and the International Bird Flu Summit, testified before Congress, appeared on The Dr. Oz Show and The Colbert Report, and was invited as an expert witness in defense of Oprah Winfrey at the infamous "meat defamation" trial.


7 responses to “How can you believe in any scientific study?

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  1. I would appreciate more opinion. After doing our own research and asking ourselves “What does the best available evidence show right now?”, how do we decide what is the best evidence and how much evidence is enough to establish a starting argument? Thanks!

  2. “Marijuana users had a lower age-adjusted prevalence of DM compared to non-marijuana users (OR 0.42, 95% CI 0.33 to 0.55; p0.5 mg/dl) was significantly higher (p<0.0001) among non-marijuana users (18.9%) than among past (12.7%) or current light (15.8%) or heavy (9.2%) users. In a robust multivariate model controlling for socio-demographic factors, laboratory values and comorbidity, the lower odds of DM among marijuana users was significant (adjusted OR 0.36, 95% CI 0.24 to 0.55; p<0.0001)"

    "Marijuana use was independently associated with a lower prevalence of DM. Further studies are needed to show a direct effect of marijuana on DM."

    http://bmjopen.bmj.com/content/2/1/e000494.short

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