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Philly’s street fentanyl contains an industrial chemical called BTMPS that’s an ingredient in plastic

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theconversation.com – Karli Hochstatter, Research Scientist in Epidemiology and Health Services, Columbia University – 2025-03-06 07:34:00

Adulterants such as xylazine, medetomidine and now BTMPS are common in Philly’s street fentanyl.
Juan Pablo Pino/AFP via Getty Images

Karli Hochstatter, Columbia University and Fernando Montero, Columbia University

As much as half of the fentanyl sold on Philly’s streets contains an industrial chemical used in plastics manufacturing. That’s according to our November 2024 testing of fentanyl samples collected in Philadelphia’s Kensington neighborhood, regarded as the largest open-air drug market on the East Coast.

What’s more, the amount, or concentration, of this industrial chemical in the drug samples often exceeded the amount of fentanyl.

We are an epidemiologist and anthropologist whose research focuses on substance use disorders and the opioid overdose epidemic. Our team’s findings were published in the peer-reviewed Journal of the American Medical Association in February 2025.

The industrial chemical we found is called BTMPS, which is the common abbreviation for bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate. BTMPS belongs to a class of molecules called hindered amine light stabilizers that manufacturers frequently add to plastics and other polymers to protect against degradation from heat and sunlight.

Since March 2024, our team has tested 228 street fentanyl samples collected in Kensington. Of these, 39 – or 17% – contained BTMPS.

We first detected BTMPS in Philadelphia in June 2024. We found it in two of the eight samples – 25% – that we collected that month. By November 2024, 12 of 22 samples – or 55% – contained BTMPS.

Why BTMPS is being added to the street opioid supply, and at what stage in production or distribution it is being added, remains unknown.

Researchers suspect that it may be added to stabilize a fentanyl precursor chemical that is susceptible to degradation from heat and oxygen.

Given its low cost, BTMPS may also be added to dilute other psychoactive substances or more expensive ingredients or both.

Used needly, Narcan dispensers and other items collects in large puddle on ground
Kensington Avenue in North Philadelphia is considered the epicenter of the city’s opioid crisis.
Spencer Platt via Getty Images

How toxic is BTMPS?

Among the 39 samples that contained BTMPS in Philadelphia, the average amount of BTMPS was nearly double that of fentanyl. On average, BTMPS made up 4% of the sample, while fentanyl made up 2.3% of the sample. In one sample tested, BTMPS made up 18% of the sample.

BTMPS has not been approved for human consumption or been studied in humans.

However, it has been shown in rat studies to reduce nicotine use and attenuate withdrawal symptoms associated with morphine and cocaine.

The rat studies revealed several adverse health effects from exposure to BTMPS. They include heart defects, serious eye damage and death.

These findings raise concerns about the increasing exposure of BTMPS to humans through street drugs. The concentrations up to 18% found in the Philly samples are many orders of magnitude higher than the estimated concentration of 0.1% to 0.5% that people are exposed to through plastic products.

Pair of hands wearing black gloves holds small plastic bag containing a small amount of orange-brown powder
Some of the street fentanyl samples from Philadelphia contained more BTMPS than fentanyl.
Joe Lamberti for The Washington Post via Getty Images

BTMPS appearing in fentanyl across the US

Our colleagues who are testing street opioid samples in other regions also detected BTMPS in fentanyl samples or paraphernalia residue in Delaware, Maryland, Nevada, Washington and California. In Los Angeles, BTMPS was first detected in July 2024 – by September, 56% of samples there contained it.

The sudden and almost simultaneous appearance of a new adulterant in U.S. street opioids from the East Coast to the West Coast is rare. For example, fentanyl, xylazine and medetomidine became prevalent in the U.S. opioid supply in different regions at different times.

The recent emergence of BTMPS in street opioid markets nationwide suggests that it may be entering the supply at an early stage in production or wholesale distribution.

Historically, Philadelphia’s street opioid supply has had strong ties to Puerto Rico. These ties influenced Philly’s early incorporation of the veterinary sedative xylazine into the street drug supply. Since 2021, xylazine has been present in virtually all of Philly’s street fentanyl.

Given these associations, we are also testing the street opioid supply in Puerto Rico to examine potential similarities and relationships with Philadelphia’s supply. To date, we have detected BTMPS in two out of 49 – or 4% – of street opioid samples in Puerto Rico. We first detected it in a sample in September 2024 and again in December 2024.

What’s next

We continue to monitor BTMPS trends in Philadelphia’s street fentanyl. We are also examining whether concentrations of fentanyl and other key compounds such as xylazine in Philly’s street fentanyl have changed as new adulterants such as BTMPS and medetomidine become more widespread – and whether these changes play a role in the declining overdose death rate in Pennsylvania and other parts of the U.S.

We are also developing plans to study the immediate and long-term effects that BTMPS exposure has on people using drugs.The Conversation

Karli Hochstatter, Research Scientist in Epidemiology and Health Services, Columbia University and Fernando Montero, Postdoctoral Research Fellow in Psychiatry and Social Work, Columbia University

This article is republished from The Conversation under a Creative Commons license. Read the original article.

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AI-generated images can exploit how your mind works − here’s why they fool you and how to spot them

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theconversation.com – Arryn Robbins, Assistant Professor of Psychology, University of Richmond – 2025-04-11 07:43:00

A beautiful kitchen to scroll past – but check out the clock.
Tiny Homes via Facebook

Arryn Robbins, University of Richmond

I’m more of a scroller than a poster on social media. Like many people, I wind down at the end of the day with a scroll binge, taking in videos of Italian grandmothers making pasta or baby pygmy hippos frolicking.

For a while, my feed was filled with immaculately designed tiny homes, fueling my desire for minimalist paradise. Then, I started seeing AI-generated images; many contained obvious errors such as staircases to nowhere or sinks within sinks. Yet, commenters rarely pointed them out, instead admiring the aesthetic.

These images were clearly AI-generated and didn’t depict reality. Did people just not notice? Not care?

As a cognitive psychologist, I’d guess “yes” and “yes.” My expertise is in how people process and use visual information. I primarily investigate how people look for objects and information visually, from the mundane searches of daily life, such as trying to find a dropped earring, to more critical searches, like those conducted by radiologists or search-and-rescue teams.

With my understanding of how people process images and notice − or don’t notice − detail, it’s not surprising to me that people aren’t tuning in to the fact that many images are AI-generated.

We’ve been here before

The struggle to detect AI-generated images mirrors past detection challenges such as spotting photoshopped images or computer-generated images in movies.

But there’s a key difference: Photo editing and CGI require intentional design by artists, while AI images are generated by algorithms trained on datasets, often without human oversight. The lack of oversight can lead to imperfections or inconsistencies that can feel unnatural, such as the unrealistic physics or lack of consistency between frames that characterize what’s sometimes called “AI slop.”

Despite these differences, studies show people struggle to distinguish real images from synthetic ones, regardless of origin. Even when explicitly asked to identify images as real, synthetic or AI-generated, accuracy hovers near the level of chance, meaning people did only a little better than if they’d just guessed.

In everyday interactions, where you aren’t actively scrutinizing images, your ability to detect synthetic content might even be weaker.

Attention shapes what you see, what you miss

Spotting errors in AI images requires noticing small details, but the human visual system isn’t wired for that when you’re casually scrolling. Instead, while online, people take in the gist of what they’re viewing and can overlook subtle inconsistencies.

Visual attention operates like a zoom lens: You scan broadly to get an overview of your environment or phone screen, but fine details require focused effort. Human perceptual systems evolved to quickly assess environments for any threats to survival, with sensitivity to sudden changes − such as a quick-moving predator − sacrificing precision for speed of detection.

This speed-accuracy trade-off allows for rapid, efficient processing, which helped early humans survive in natural settings. But it’s a mismatch with modern tasks such as scrolling through devices, where small mistakes or unusual details in AI-generated images can easily go unnoticed.

People also miss things they aren’t actively paying attention to or looking for. Psychologists call this inattentional blindness: Focusing on one task causes you to overlook other details, even obvious ones. In the famous invisible gorilla study, participants asked to count basketball passes in a video failed to notice someone in a gorilla suit walking through the middle of the scene.

YouTube video
If you’re counting how many passes the people in white make, do you even notice someone walk through in a gorilla suit?

Similarly, when your focus is on the broader content of an AI image, such as a cozy tiny home, you’re less likely to notice subtle distortions. In a way, the sixth finger in an AI image is today’s invisible gorilla − hiding in plain sight because you’re not looking for it.

Efficiency over accuracy in thinking

Our cognitive limitations go beyond visual perception. Human thinking uses two types of processing: fast, intuitive thinking based on mental shortcuts, and slower, analytical thinking that requires effort. When scrolling, our fast system likely dominates, leading us to accept images at face value.

Adding to this issue is the tendency to seek information that confirms your beliefs or reject information that goes against them. This means AI-generated images are more likely to slip by you when they align with your expectations or worldviews. If an AI-generated image of a basketball player making an impossible shot jibes with a fan’s excitement, they might accept it, even if something feels exaggerated.

While not a big deal for tiny home aesthetics, these issues become concerning when AI-generated images may be used to influence public opinion. For example, research shows that people tend to assume images are relevant to accompanying text. Even when the images provide no actual evidence, they make people more likely to accept the text’s claims as true.

Misleading real or generated images can make false claims seem more believable and even cause people to misremember real events. AI-generated images have the power to shape opinions and spread misinformation in ways that are difficult to counter.

Beating the machine

While AI gets better at detecting AI, humans need tools to do the same. Here’s how:

  1. Trust your gut. If something feels off, it probably is. Your brain expertly recognizes objects and faces, even under varying conditions. Perhaps you’ve experienced what psychologists call the uncanny valley and felt unease with certain humanoid faces. This experience shows people can detect anomalies, even when they can’t fully explain what’s wrong.
  2. Scan for clues. AI struggles with certain elements: hands, text, reflections, lighting inconsistencies and unnatural textures. If an image seems suspicious, take a closer look.
  3. Think critically. Sometimes, AI generates photorealistic images with impossible scenarios. If you see a political figure casually surprising baristas or a celebrity eating concrete, ask yourself: Does this make sense? If not, it’s probably fake.
  4. Check the source. Is the poster a real person? Reverse image search can help trace a picture’s origin. If the metadata is missing, it might be generated by AI.

AI-generated images are becoming harder to spot. During scrolling, the brain processes visuals quickly, not critically, making it easy to miss details that reveal a fake. As technology advances, slow down, look closer and think critically.The Conversation

Arryn Robbins, Assistant Professor of Psychology, University of Richmond

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Social media before bedtime wreaks havoc on our sleep − a sleep researcher explains why screens alone aren’t the main culprit

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theconversation.com – Brian N. Chin, Assistant Professor of Psychology, Trinity College – 2025-04-08 07:49:00

Social media use before bedtime can be stimulating in ways that screen time alone is not.
Adam Hester/Tetra Images via Getty Images

Brian N. Chin, Trinity College

“Avoid screens before bed” is one of the most common pieces of sleep advice. But what if the real problem isn’t screen time − it’s the way we use social media at night?

Sleep deprivation is one of the most widespread yet overlooked public health issues, especially among young adults and adolescents.

Despite needing eight to 10 hours of sleep, most adolescents fall short, while nearly two-thirds of young adults regularly get less than the recommended seven to nine hours.

Poor sleep isn’t just about feeling tired − it’s linked to worsened mental health, emotion regulation, memory, academic performance and even increased risk for chronic illness and early mortality.

At the same time, social media is nearly universal among young adults, with 84% using at least one platform daily. While research has long focused on screen time as the culprit for poor sleep, growing evidence suggests that how often people check social media − and how emotionally engaged they are − matters even more than how long they spend online.

As a social psychologist and sleep researcher, I study how social behaviors, including social media habits, affect sleep and well-being. Sleep isn’t just an individual behavior; it’s shaped by our social environments and relationships.

And one of the most common yet underestimated factors shaping modern sleep? How we engage with social media before bed.

Emotional investment in social media

Beyond simply measuring time spent on social media, researchers have started looking at how emotionally connected people feel to their social media use.

Some studies suggest that the way people emotionally engage with social media may have a greater impact on sleep quality than the total time they spend online.

In a 2024 study of 830 young adults, my colleagues and I examined how different types of social media engagement predicted sleep problems. We found that frequent social media visits and emotional investment were stronger predictors of poor sleep than total screen time. Additionally, presleep cognitive arousal and social comparison played a key role in linking social media engagement to sleep disruption, suggesting that social media’s effects on sleep extend beyond simple screen exposure.

I believe these findings suggest that cutting screen time alone may not be enough − reducing how often people check social media and how emotionally connected they feel to it may be more effective in promoting healthier sleep habits.

How social media disrupts sleep

If you’ve ever struggled to fall asleep after scrolling through social media, it’s not just the screen keeping you awake. While blue light can delay melatonin production, my team’s research and that of others suggests that the way people interact with social media may play an even bigger role in sleep disruption.

Here are some of the biggest ways social media interferes with your sleep:

  • Presleep arousal: Doomscrolling and emotionally charged content on social media keeps your brain in a state of heightened alertness, making it harder to relax and fall asleep. Whether it’s political debates, distressing news or even exciting personal updates, emotionally stimulating content can trigger increased cognitive and physiological arousal that delays sleep onset.

  • Social comparison: Viewing idealized social media posts before bed can lead to upward social comparison, increasing stress and making it harder to sleep. People tend to compare themselves to highly curated versions of others’ lives − vacations, fitness progress, career milestones − which can lead to feelings of inadequacy and anxiety that disrupt sleep.

  • Habitual checking: Social media use after lights out is a strong predictor of poor sleep, as checking notifications and scrolling before bed can quickly become an automatic habit. Studies have shown that nighttime-specific social media use, especially after lights are out, is linked to shorter sleep duration, later bedtimes and lower sleep quality. This pattern reflects bedtime procrastination, where people delay sleep despite knowing it would be better for their health and well-being.

  • Fear of missing out, or FOMO: The urge to stay connected also keeps many people scrolling long past their intended bedtime, making sleep feel secondary to staying updated. Research shows that higher FOMO levels are linked to more frequent nighttime social media use and poorer sleep quality. The anticipation of new messages, posts or updates can create a sense of social pressure to stay online and reinforce the habit of delaying sleep.

Taken together, these factors make social media more than just a passive distraction − it becomes an active barrier to restful sleep. In other words, that late-night scroll isn’t harmless − it’s quietly rewiring your sleep and well-being.

How to use social media without sleep disruption

You don’t need to quit social media, but restructuring how you engage with it at night could help. Research suggests that small behavioral changes to your bedtime routine can make a significant difference in sleep quality. I suggest trying these practical, evidence-backed strategies for improving your sleep:

  • Give your brain time to wind down: Avoid emotionally charged content 30 to 60 minutes before bed to help your mind relax and prepare for sleep.

  • Create separation between social media and sleep: Set your phone to “Do Not Disturb” or leave it outside the bedroom to avoid the temptation of late-night checking.

  • Reduce mindless scrolling: If you catch yourself endlessly refreshing, take a small, mindful pause and ask yourself: “Do I actually want to be on this app right now?”

A brief moment of awareness can help break the habit loop.The Conversation

Brian N. Chin, Assistant Professor of Psychology, Trinity College

This article is republished from The Conversation under a Creative Commons license. Read the original article.

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Providing farmworkers with health insurance is worth it for their employers − new research

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theconversation.com – John Lowrey, Assistant Professor of Supply Chain and Health Sciences, Northeastern University – 2025-04-08 07:48:00

Farmworkers at Del Bosque Farms pick and pack melons on a mobile platform in Firebaugh, Calif., in July 2021.
AP Photo/Terry Chea

John Lowrey, Northeastern University; Timothy Richards, Arizona State University, and Zachariah Rutledge, Michigan State University

Agricultural employers who provide farmworkers with health insurance earn higher profits, even after accounting for the cost of that coverage. In addition, farmworkers who get health insurance through their employers are more productive and earn more money than those who do not.

These are the key findings from our study published in the March 2025 issue of the American Journal of Agricultural Economics.

To conduct this research, we crunched over three decades of data from the Labor Department’s National Agricultural Workers Survey. We focused on California, the nation’s largest producer of fruits, nuts and other labor-intensive agricultural products in the U.S., from 1989 to 2022.

We determined that if 20% more farmworkers got health insurance coverage, they would have earned $23,063 a year in 2022, up from $22,482 if they did not. Their employers, meanwhile, would earn $7,303 in net profits per worker annually in this same scenario, versus $6,598.

Why it matters

Roughly half of California’s agricultural employers are facing labor shortages at a time when the average age of U.S. farmworkers is also rising.

Some of them, including grape producers, are responding by investing more heavily in labor-saving equipment, which helps reduce the need for seasonal manual labor. However, automated harvesting isn’t yet a viable or affordable option for labor-intensive specialty crops such as melons and strawberries.

Despite labor shortages, agricultural employers may be reluctant to increase total compensation for farmworkers. They may also be wary of providing additional benefits such as health insurance for two main reasons.

First, seasonal workers are, by definition, transient, meaning that the employer who provides coverage may not necessarily be the same one who benefits from a healthier worker. Second, it costs an employer money but doesn’t necessarily benefit them in the future if the worker moves on.

Most U.S. farmworkers are immigrants from Mexico or Central America. Roughly 42% are immigrants who are in the U.S. without legal authorization, down from 55% in the early 2000s.

As the share of farmworkers who are unauthorized immigrants has declined, the share who are U.S. citizens – including those born here – has grown and now stands at about 39%.

The low wages farmworkers earn offer little incentive for more U.S. citizens and permanent residents to take these jobs. These jobs might become more attractive if employers offered health care coverage to protect the health of the worker and their household.

Farmworkers who lack legal authorization to be in the U.S. are not eligible for private health insurance policies, and many can’t enroll in Medicaid, a government-run health insurance program that’s primarily for low-income Americans and people with disabilities. Regardless, some employers do take steps to help them gain access to health care services. As of 2025, a large share of farmworkers remain uninsured, including many citizens and immigrants with legal status.

Limited access to health care is an unfortunate reality for farmworkers, whose jobs are physically demanding and dangerous. In addition, farmworkers are paid at or near the minimum wage and are constantly searching for their next employment opportunity. This uncertainty causes high levels of stress, which can contribute to chronic health issues such as hypertension.

What still isn’t known

It is hard to estimate the effect of employer-provided health insurance on workers and employers, since labor market outcomes are a result of highly complex interactions.

For example, wages, productivity and how long someone keeps their job are highly interdependent variables determined by the interaction between what workers seek and what employers offer. And wages do not always reflect a worker’s skills and abilities, as some people are more willing to accept a job with low pay if their compensation includes good benefits such as health insurance.

The Research Brief is a short take about interesting academic work.The Conversation

John Lowrey, Assistant Professor of Supply Chain and Health Sciences, Northeastern University; Timothy Richards, Professor of Agribusiness, Arizona State University, and Zachariah Rutledge, Assistant Professor of Agricultural, Food and Resource Economics, Michigan State University

This article is republished from The Conversation under a Creative Commons license. Read the original article.

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