It is linked to cognitive deficits marijuana? No. Is marijuana “gateway drug ‘? No. Can smoking marijuana damages the lungs? No. Does marijuana cause anxiety and depression? No. Is marijuana use associated with adolescent IQ or educational activities? No. does marijuana kill cancer cells? Yes. is not wonder why?
In October 2012, a study, more than thirty years in the making found that smoking marijuana permanently reduces the intelligence quotient or IQ. persistent use of marijuana, the researchers found, was associated with generalized neuropsychological impairment in all areas of operation.
In addition, the researchers said cessation of marijuana not fully restored neuropsychological functioning between adolescent cannabis users start. In the end, the researchers concluded that marijuana has a neurotoxic effect on the brains of adolescents.
Less than four years later, a couple of studies investigating how the IQ of adolescent marijuana users compared with their peers withdrawal found that there was no measurable link between marijuana use and lower IQ. The first study (conducted by researchers at University College London, Queen Mary University of London and the University of Bristol) noted:
“There is much debate about the impact of cannabis use among adolescents in intellectual and educational outcomes. associations between cannabis use and IQ of adolescents and educational level were investigated in a sample of 2235 adolescents Avon Longitudinal Study of Parents and Children … those who had used cannabis ⩾50 sometimes not differ from nonusers of both IQ or educational performance.
“These findings suggest that consumption of adolescent cannabis is not associated with IQ or educational performance once the adjustment is made potential confounds in particular adolescent cigarette use. cannabis in modest adolescents may have less cognitive impact that epidemiological cohort studies have previously suggested older. “
So what caused lower IQ levels among those who had smoked marijuana at least 50 times by the age of 15? The researchers found that the highest rates of childhood behavioral problems, depressive symptoms, and other substances – particularly alcohol and cigarettes – discovered among marijuana smokers may have been responsible for their reduced IQ. In fact, since marijuana users were 17 times more likely to also smoke cigarettes, researchers speculate that cigarette use may be a more reliable predictor of reduced IQ in the study group.
In the second study (conducted by researchers at the University of Southern California, University of Minnesota, the University of Pennsylvania and the University of Orebro), the effects of marijuana on the IQ of about 2,000 teenage twins living in Los Angeles and Minnesota (where one twin was a regular user, while the other were not examined.) over a period of nearly a decade
the report read:
Marijuana users scored lower compared to nonusers and showed a significant decrease of crystallized intelligence between late adolescence and preadolescence. However, there was no evidence of a dose-response relationship between the frequency of use and change the intelligence quotient (IQ).
Moreover, the twins who consume marijuana did not show significantly higher IQ decline relative to their siblings withdrawal. The evidence of these two samples suggests that the declines observed in the measured IC can not be a direct result of exposure to marijuana, but rather attributable to familial factors that underlie both the initiation of marijuana and low intellectual level.
The two studies clearly indicate that marijuana is an unlikely cause any decrease IQ. The question raised is, then, why we are forced to believe that marijuana is linked to cognitive deficits, including memory loss and low IQ? For the same reason I was brainwashed for more than five decades in the belief that saturated fat causes heart disease when the culprit was actually sugar. Large pharmaceutical companies do not want you to know the truth. . Period
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