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Neighborhood Marijuana Dispensaries Don’t Increase Teen Use, Study Shows

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Numerous states with medical marijuana laws on the books don’t allow dispensaries near school grounds, ostensibly because regulators fear being close to legal cannabis providers would increase the likelihood of underage consumption.

But that’s not necessarily the case, according to a recent study published in the Journal of Adolescent Health.

Analyzing national survey data, researchers found that the number of medical cannabis dispensaries within three miles of a school didn’t correspond with higher rates of adolescent marijuana use. Neither did the price or variety of cannabis products offered by those dispensaries.

“We reported null associations of the proximity and density of medical marijuana dispensaries in school neighborhoods with adolescents’ use,” the study concluded. “However, competition from medical marijuana dispensaries could have reduced the price of marijuana on the street and adolescents’ marijuana use may be influenced indirectly. This possible mechanism is worth further investigation.”

The researchers cautioned that their findings “should not be used as evidence against marijuana regulation strategies such as licensing, zoning ordinances, taxation, or policies to limit product type.” Rather, “the findings illustrate the current state of the medical marijuana environment.”

Still, the study appears to contradict talking points from legalization opponents, who have often with great concern compared the number of marijuana businesses in a given jurisdiction to the number of Starbucks or McDonald’s locations, for example.

But the new study shows that whether a certain area has more or fewer dispensaries close to a school doesn’t seem to impact adolescent marijuana use, at least in California where the data was collected.

The most meaningful factors when it comes to predicting youth marijuana use, or future potential for use, were their age, disposable income and history of consumption.

“The lack of relationship between the availability of medical marijuana dispensaries and marijuana use behaviors among the adolescent population is inconsistent with previous research on the adult population,” the researchers wrote. “This discrepancy may be due to medical marijuana dispensaries not being the primary source of marijuana for adolescents.”

Interestingly, the survey—which included more than 46,000 adolescents in California—found that rates of past-month marijuana use were notably lower than estimates provided by the 2016 Monitoring the Future survey. That survey projected that an average of 5.4 percent of 8th graders, 14 percent of 10th graders and 18.44 percent of 12th graders in the state would have used marijuana in the past month.

But the study found that “[t]he prevalence [of past-month marijuana use] for 8th, 10th, and 12th graders was 3.50 percent, 11.43 percent, and 18.44 percent, respectively…”

It’s possible, as the researchers noted, that California’s recreational marijuana system could change the calculus—but at the very least, what the study suggests is that the mere presence of regulated dispensaries doesn’t predicate higher adolescent cannabis use.

Legalizing Marijuana Brings Illicit Consumers To The Legal Market, Study Says

Photo courtesy of Martin Alonso.

Marijuana Moment is made possible with support from readers. If you rely on our cannabis advocacy journalism to stay informed, please consider a monthly Patreon pledge.

Kyle Jaeger is Marijuana Moment's Los Angeles-based associate editor. His work has also appeared in High Times, VICE and attn.

Science & Health

Scientists Actually Did A Study To Confirm That Marijuana Causes The Munchies

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Science has confirmed that marijuana really does cause the munchies.

More precisely, a new study found that sales of commonly munched on products like ice cream, cookies and chips tend to go up after states legalize cannabis.

To do so, a team of researchers developed complicated mathematical formulas like the one featured below and analyzed a trove of retail scanner data.

Via SSRN.

The study indicates that the “widespread urban myth” that cannabis stimulates hunger and drives people to gorge on goodies is a myth no longer. The researchers looked at retail scanner data in more than 2,000 counties across the U.S. from 2006 to 2016 to determine whether states that legalize marijuana for adult use experience increases in the sale of high-calorie food items.

Past studies on the munchies have relied on data that’s “correlational and indirect,” they wrote. This paper, meanwhile, tested the hypothesis by factoring in the “differences in timing of the legalization of recreational marijuana across states” and specifically comparing “retail food purchases for the subsample of contiguous counties across [recreational marijuana law] and non-[recreational marijuana law] shared borders only.”

The study found causal evidence that legalizing cannabis was associated with higher so-called “junk food purchases.

Shortly after a state’s legal marijuana system became effective, average monthly sales of ice cream, cookies and chips jumped 3.1 percent, 4.1 percent and 5.3 percent, respectively. And that was the case even after the researchers accounted for “state- and pair-specific time trends.”

“The increase in sales starts at the time of the legislation becomes effective,” the study authors wrote. “The effect slightly decreases in the semesters thereafter for ice cream and chips, but not for cookies.”

That’s probably a welcome finding for Girl Scouts in Colorado. The state’s chapter recently lifted a ban on selling cookies outside of “adult-oriented businesses” such as marijuana stores, where the scouts can rest assured they’ll find a hungry customer base.

Study Shows That Bees Like Hemp, And That’s Great News For The Environment

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Study Shows That Bees Like Hemp, And That’s Great News For The Environment

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Farmers (and Sen. Mitch McConnell) aren’t the only ones who are excited about hemp. According to a recent study, the crop also attracts a variety of bees—and that can help inform ecologically sustainable agriculture practices.

For the study, published this month in the journal Biomass and Bioenergy, researchers at Colorado State University set up 10 traps at industrial hemp fields in northern Colorado and collected bees over the course of five days during peak flowering season.

There are few other crops that pollinate in the region during the same timeframe, so the team wanted to know whether the non-psychoactive cannabis cousin of marijuana represented “a potentially valuable source of pollen for foraging bees,” which play a critical role in maintaining “sustainable productivity in natural and agricultural ecosystems.”

When the researchers looked at their collection, they found almost 2,000 bees from 23 different bee genera. Most of those (38 percent) were classic honeybees, but there were also specialized genera such as Melissodes bimaculata and Peponapis pruinosa that turned up in surprisingly “high proportions.”

The sample also indicated that hemp flowers are uniquely attractive to bees because previous reports looking at bee abundance and diversity for crops like genetically modified canola flowers didn’t produce the same volume or variety.

“Industrial hemp can play an important role in providing sustained nutritional options for bees during the cropping season.”

The study could prove helpful as ecologists attempt to address declining bee populations. The insects “continue to face debilitating challenges due to a number of different stressors,” the researchers wrote, but chief among them is the overall health of their respective habitats.

Finding a suitable pollinating crop to improve their habitats is, therefore, critical to the lives of bees and the ecosystems they occupy. Hemp “can thus be an ecologically valuable crop whose flowers are attractive to managed honey bees and a wide range of wild bees,” the researchers concluded.

“In addition, access to crucial phytochemicals through pollen and nectar from diverse plant sources is important for improved survival and pathogen tolerance in honey bees,” the team wrote. “Further studies analyzing the nutritive value of hemp pollen, would provide strong evidence in support of the ecological benefits.”

But the study also includes a warning: as hemp cultivation expands, which experts expect it will significantly since it has recently been federally legalized, there will be an increased risk of insect pests infecting the crop. And so the researchers said they “strongly urge that the information generated in this study on the diversity and abundance of bees on hemp be used to develop an integrated pest management plan designed to protect pollinators while controlling pests.”

Blood-Sucking Flies Love Marijuana, New Study Finds

Photo courtesy of Pixabay.

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Science & Health

States With Legal Medical Marijuana Have Lower Teen Use Rates, Large-Scale Study Finds

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Contrary to often-expressed fears of marijuana legalization opponents, teens living in states that allow medical cannabis are actually less likely to use the drug compared to those in non-legal states.

That’s the result of a new study published in The American Journal of Drug and Alcohol Abuse.

Researchers at Boston College looked at national youth drug surveys from 1999 to 2015—a data set that involved more than 860,000 adolescents across the United States. They investigated how self-reported marijuana use changed in states that have either decriminalized cannabis possession or legalized it for medical purposes.

And while opponents of legalization have long argued that loosening marijuana laws would drive more youth to consume cannabis, the study showed the opposite. The enactment of medical cannabis laws was associated with 1.1 percentage point reduction in marijuana use among teens.

“We found that for every group of 100 adolescents, one fewer will be a current user of marijuana following the enactment of medical marijuana laws,” study author Rebekah Levine Coley said in a press release.

That decline was even more pronounced within certain subgroups. For example, 3.9 percent fewer black adolescents and 2.7 percent fewer Hispanic adolescents used marijuana in legal medical cannabis states.

The trend also held true after researchers accounted for factors such as state demographics and economic trends. What’s more, the reductions in youth marijuana use were more significant the longer a state had a medical cannabis system in effect.

“Some people have argued that decriminalizing or legalizing medical marijuana could increase cannabis use amongst young people, either by making it easier for them to access, or by making it seem less harmful,” Coley said. “However, we saw the opposite effect.”

“We were not able to determine why this is, but other research has suggested that after the enactment of medical marijuana laws, youths’ perceptions of the potential harm of marijuana use actually increased. Alternatively, another theory is that as marijuana laws are becoming more lenient, parents may be increasing their supervision of their children, or changing how they talk to them about drug use.”

States that have simply decriminalized cannabis possession did not experience the same reductions in youth marijuana use, the study also found. There were slight declines in usage among 14-year-olds and Hispanic youth, but the broader reductions were only seen in medical marijuana states.

Patients Are Substituting Marijuana For Addictive Pharmaceutical Drugs, Two New Studies Show

Photo courtesy of Nicholas C. Morton.

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