Cannabinoids may cause antitumor effects by various mechanisms, including induction of cell death, inhibition of cell growth, and inhibition of tumor angiogenesis and metastasis.[9-11] Cannabinoids appear to kill tumor cells but do not affect their nontransformed counterparts and may even protect them from cell death.
It wouldn't have mattered if Bill Clinton inhaled, as far as his lungs are concerned. Smoking up to a joint per day doesn't seem to decrease lung function, according to a study published in Jan. 11 edition of Journal of the American Medical Association.
In fact, occasional marijuana use was associated with slight increases in lung airflow rates and increases in lung volume, the study found.
The study, led by Mark Pletcher of the University of California, San Francisco, compared the effects of both cigarette and marijuana smoking over a period of 20 years in a group of more than 5,000 adults, part of a longitudinal study called Coronary Artery Risk Development in Young Adults (CARDIA).
The data revealed nothing new about tobacco: As exposure to tobacco goes up, lung capacity in terms of the amount of air a smoker can exhale goes down. It's a linear relationship.
Not so with marijuana. More pot smoking was associated with increases in lung capacity up to a level equivalent to about one joint per day for seven years or one joint per week for up to 49 years. Only at levels of marijuana smoking higher than this did the researchers see a leveling off and then potential reversal of this relationship to improved lung capacity.I remember hearing of a couple studies over the years where the thc coated the lungs, protecting the lung from smoke damage.http://www.foxnews.com/story/0,2933,196678,00.html
While a clear increase in cancer risk was seen among cigarette smokers in the study, no such association was seen for regular cannabis users.
Even very heavy, long-term marijuana users who had smoked more than 22,000 joints over a lifetime seemed to have no greater risk than infrequent marijuana users or nonusers.
The findings surprised the study’s researchers, who expected to see an increase in cancer among people who smoked marijuana regularly in their youth.
The heaviest marijuana users in the study had smoked more than 22,000 joints, while moderately heavy smokers had smoked between 11,000 and 22,000 joints.
While two-pack-a-day or more cigarette smokers were found to have a 20-fold increase in lung cancer risk, no elevation in risk was seen for even the very heaviest marijuana smokers.
So why isn’t smoking marijuana as dangerous as smoking cigarettes in terms of cancer risk?
The answer isn’t clear, but the experts say it might have something to do with tetrahydrocannabinol, or THC, which is a chemical found in marijuana smoke.
Cellular studies and even some studies in animal models suggest that THC has antitumor properties, either by encouraging the death of genetically damaged cells that can become cancerous or by restricting the development of the blood supply that feeds tumors, Tashkin tells WebMD.
In a review of the research published last fall, University of Colorado molecular biologist Robert Melamede, PhD, concluded that the THC in cannabis seems to lessen the tumor-promoting properties of marijuana smoke.
According to the National Cancer Institute, it has anti tumor properties that protect the lungs. *see top quote and link*
The other study tracks 5100 people for 20 years and there was absolutely no decrease in lung capacity, if anything tokers had slightly increased lung capacity.
3rd quote is from your trusted source, Fox news, for all you right wingers. Notice the bolded and orange parts.
*Looks around at fellow Americans* doesn't even take 22,000 trips to make us a bunch of impotent, beached wales with diabetes in our 20's, heart disease being more common than not, and brains clogged with the same saturated fat causing the limp dicks, angina, and heart disease.
Servant of the Great Beard
I am no bigot, nor a Junky.....my view on Marijuana is the following:
It is not part of Western culture (as opposite to alcohol)...just as acohol was not part of Native American or Native Australian culture....
Alcohol, unmanageble for them, helped bring to an end (espoecially from a Moral point of view) the decaying Native cultures, in the same way Marijuana helps bring an end to our decadent West...... disappearence of male/female roles, destruction of the family and of the sense of community, respect of the elders etc... are all (partially) causes and consequences of this stuff and of this "culture"...enjoy our twilight.....Junkies
"Let us control the money of a nation, and we care not who makes its laws" Mayer Amschel "Rothschild"
CBD's counteract THC, having a higher ratio of THC has more "mental" effects, such as paranoia which some people experience the first time they try it, or after taking a break and coming back to it.
CBD's have more of the body effects and is better for pain treatments, anti inflamation, and general aura or euphoria.
The shiny "crystals", which are trichomes, start out as almost pure THC, and as the plant matures they convert to CBD's, changing from clear to "amber" color. A grower checks his plants with a magnifying glass throughout the weeks prior to harvest. Different people have different preferences. Typically a grower will harvest their own stash early, then let the rest go another 2 weeks as it "bulks" up in weight as it matures. Usually you harvest when 30-50% of the trichomes have converted to "amber" color.
It's a lot more complicated than most people think, different genetic strains have different attributes, different harvest times give different attributes, and different environmental conditions (lighting, soil, nutrients, infestations) give different attributes/results.
Edit: However! If this trend gains traction, then I'll explain my first point. The misconception was that I was making a truism or something; I was merely suggesting a possible issue.
Last edited by philipc4; 05-02-2012 at 17:57.
Servant of the Great Beard