When a new addictive drug hits the market, youth are the first affected
A substance that barely existed five years ago now reaches more than one in ten American high school seniors — not through illicit channels, but through gas stations and online storefronts operating in a regulatory void. Delta-8-THC, a hemp-derived intoxicant chemically akin to marijuana, has spread fastest precisely where governance has been slowest, offering researchers and policymakers a rare, if troubling, natural experiment in what happens when a new addictive product meets an unprotected generation. The pattern is not new, but the stakes are: adolescent brains, unknown long-term harms, and a market designed with no obligation to protect the young.
- Over 11% of U.S. high school seniors used delta-8-THC in 2023 — a substance that didn't exist on store shelves until 2018 — signaling an adoption curve that has outpaced any public health response.
- With no federal age restrictions and products sold openly at gas stations and online, teenagers in unregulated states are nearly three times more likely to use delta-8 than those in states with oversight.
- More than a third of teen users reported consuming it ten or more times in a year, suggesting this is not casual curiosity but a pattern of regular use forming in real time.
- Scientists warn the substance likely carries the same risks as marijuana — impaired brain development, addiction, behavioral harm — yet most products are untested, unlabeled, and free to be marketed directly to young people.
- Researchers and public health advocates are urging states to act now, pointing to the e-cigarette crisis as a cautionary tale of what happens when commercialization races ahead of protection.
In 2023, more than one in ten American high school seniors reported using delta-8-THC in the past year — 11.4 percent of 12th graders, according to researchers at USC's Keck School of Medicine analyzing data from the Monitoring the Future survey. The substance, a hemp-derived intoxicant sold in gummies and vapes, has only been commercially available since 2018, making its rapid rise among teenagers a striking public health development.
Delta-8-THC occupies a regulatory gray zone. Because it is derived from hemp rather than marijuana, it falls outside federal age restrictions and sits on gas station shelves and online storefronts with little oversight. The regional data makes the consequences of that gap plain: youth use stood at just 5 percent in Western states but climbed to 14.3 percent in the South and 14.6 percent in the Midwest. In states with delta-8 regulations, 5.7 percent of youth used it; in states without, that figure nearly tripled to 14.4 percent.
Among those who had used delta-8 in the past year, over a third reported doing so ten or more times — a pattern of regular consumption. For comparison, 30.4 percent of the same cohort reported using marijuana, placing delta-8 firmly in the mainstream of youth substance use.
What alarms researchers most is how little is known. Delta-8's chemical structure closely resembles marijuana's primary psychoactive compound, raising concerns about adolescent brain development, addiction potential, and accidental overdose. Yet most products lack safety testing, warning labels, or any restriction on youth-targeted marketing. Lead researcher Alyssa Harlow called the prevalence figures concerning given how recently the substance emerged, while her colleague Adam Leventhal warned that the pattern mirrors the early e-cigarette crisis — a commercialized addictive product reaching youth before protections could catch up.
The study is the first nationally representative estimate of delta-8 use among American teenagers. Future survey waves will examine what forms youth are using and where they're obtaining it. Some states have moved to ban or restrict delta-8; researchers are now working to identify which interventions actually reduce use. The data suggests regulation works. The open question is whether it will arrive in time.
In 2023, more than one in ten American high school seniors had used delta-8-THC in the past year. That's 11.4 percent of 12th graders—a substance that barely existed on the market five years earlier. The finding comes from researchers at USC's Keck School of Medicine who analyzed data from the Monitoring the Future survey, the nation's most rigorous tracker of youth drug use, drawing responses from over 2,000 randomly selected students across the country.
Delta-8-THC is a hemp-derived intoxicant that produces effects similar to marijuana. It comes in gummies, vapes, and other forms that look and feel like cannabis products but are manufactured differently—typically extracted from cannabidiol found in hemp rather than from marijuana itself. Because of this technical distinction, delta-8 exists in a regulatory gray zone. There is no federal minimum age to buy it. In many states, it sits on gas station shelves and online retailers with no oversight. The substance has been commercially available only since 2018, making its sudden prevalence among teenagers particularly striking to public health researchers.
The regional variation in use rates tells a revealing story about regulation's effect. In Western states, only 5 percent of youth reported using delta-8-THC in the past year. That number climbed to 10.1 percent in the Northeast, then jumped to 14.3 percent in the South and 14.6 percent in the Midwest. The pattern held when researchers looked at regulatory status: in states that had implemented delta-8 regulations, 5.7 percent of youth used the product. In states without regulations, that figure nearly tripled to 14.4 percent. Similarly, states where adult recreational marijuana was legal showed lower youth delta-8 use (8 percent) compared to states where it remained banned (14 percent).
Among the teenagers who had used delta-8-THC in the past year, more than one-third—35.4 percent—reported using it ten or more times, suggesting regular consumption rather than experimentation. For context, 30.4 percent of the same cohort reported using marijuana in the past year, making delta-8 a significant secondary substance in the youth drug landscape.
What worries researchers most is the unknown territory they're entering. Delta-8-THC's chemical structure resembles delta-9-THC, marijuana's primary psychoactive compound, closely enough that scientists suspect it could carry similar risks: effects on adolescent brain development, addiction potential, behavioral problems, and accidental overdose. Yet because the substance is so new and largely unregulated, there are few safeguards. Most delta-8 products lack rigorous testing for contaminants or toxic compounds. There are no mandatory warning labels or ingredient disclosures. And critically, there are no restrictions on how the products can be packaged or marketed—meaning manufacturers can design them specifically to appeal to young people.
Alyssa Harlow, the study's lead author and a clinical assistant professor at USC's Keck School of Medicine, framed the concern in historical terms. "Considering that delta-8-THC has only been on the market since 2018, the fact that we're seeing more than 11 percent of youth using it is concerning," she said. Her senior colleague, Adam Leventhal, drew a parallel to earlier public health failures. "Time and time again, we see the same pattern. When a new addictive drug hits the market and is commercialized, youth are the first to be affected if public health protections are not in place. We saw this with nicotine e-cigarettes and should not let history repeat itself."
The study itself represents the first nationally representative estimate of delta-8-THC use among American youth. The 2024 Monitoring the Future survey will dig deeper, asking students what form they're using—gummies, vape cartridges, dried flower—and where they're buying it. Over time, researchers hope to track which policy interventions actually work. Some states have banned delta-8 entirely; others are considering restrictions on packaging, labeling, minimum purchase age, retail location, or mandatory contamination testing. Harlow is also investigating whether warning labels can shift how teenagers perceive the risk. The data suggests that regulation works. Now the question is whether policymakers will act before the pattern repeats itself.
Citações Notáveis
The fact that we're seeing more than 11 percent of youth using it is concerning, considering delta-8-THC has only been on the market since 2018.— Alyssa Harlow, lead author, USC Keck School of Medicine
When a new addictive drug hits the market and is commercialized, youth are the first to be affected if public health protections are not in place. We saw this with nicotine e-cigarettes and should not let history repeat itself.— Adam Leventhal, senior author, USC Keck School of Medicine
A Conversa do Hearth Outra perspectiva sobre a história
Why does delta-8 exist at all if it's just a less-regulated version of marijuana?
It's a legal loophole. The 2018 Farm Bill legalized hemp and hemp-derived products federally. Delta-8 is technically made from hemp, not marijuana, so it slipped through. Manufacturers realized they could extract it cheaply and sell it without the restrictions that apply to actual cannabis.
But if it has similar effects to marijuana, why isn't it regulated the same way?
Because the law hasn't caught up. Marijuana is a Schedule I controlled substance federally. Delta-8 isn't scheduled at all—it's in this legal limbo. Some states have moved to ban or regulate it, but many haven't. That's why you see it at gas stations in some places and not others.
The study shows use is much higher in unregulated states. Does that prove regulation works?
It's strong evidence. You can't say regulation caused the lower rates with absolute certainty from one survey, but the pattern is consistent. Where there are rules, fewer kids use it. Where there aren't, more do. That suggests access and marketing matter.
What's the actual health risk? Is delta-8 as dangerous as marijuana?
Honestly, we don't know yet. It's chemically similar enough that scientists worry it could affect brain development and create addiction the same way marijuana does. But delta-8 is so new that there's almost no long-term research. The real danger might be that we're running an experiment on teenagers without knowing what we're testing.
Why are Southern and Midwestern states seeing such high use?
Partly because many of those states lack delta-8 regulations and haven't legalized recreational marijuana. When there's a regulatory gap, the product fills it. It's available, it's legal, it's marketed aggressively. Kids find it.
What happens next?
The researchers are watching closely. They'll get more detailed data this year about what forms kids are using and where they're buying it. Meanwhile, some states will probably move to regulate or ban it. The real test is whether those policies actually reduce youth use over time.