Overdose Deaths Just Had Their Biggest Drop In History, with Keith Humphreys, Stanford Professor
August 12, 2026
Overdose deaths dropped 27% in a single year, the largest decline ever recorded. Most people have no idea it happened. Keith Humphreys, Stanford addiction expert and adviser to three US presidents, figured out why. The answer involves China, Reddit, and a supply shock nobody saw coming.
For 25 years, overdose deaths in America climbed almost without interruption. Then, in the middle of 2023, they didn't. The reversal was sudden, dramatic, and almost completely unreported. By the end of 2025, deaths were down 40-45% from the peak. Keith Humphreys was on the research team that published the findings in Science, and the explanation is not what anyone expected.
In this episode of Neural Compass, Mark Jacobstein speaks with Dr. Keith Humphreys, professor at Stanford, OBE, senior drug policy adviser in the Obama White House, and one of the world's leading experts on addiction. They trace the fentanyl supply chain from Chinese precursor chemicals through Mexican cartels and Canadian traffickers, examine why Oregon's celebrated decriminalization experiment accelerated the crisis instead of solving it, and make the case that social norms, not laws, are the most powerful force in addiction prevention.
What you will understand by the end:
- Why China is the most plausible explanation for America's overdose reversal, and what the Canada data tells us
- Why Oregon failed where Portugal succeeded, and what the difference actually was
- Why the look on your friends' faces does more to prevent addiction than any law ever has
- What AA gets right that the formal treatment system still hasn't figured out
- Why GLP-1 drugs like Ozempic may be the next frontier in treating addiction
- Neural Compass is a podcast from Jimini Health, which builds clinically embedded AI for behavioral health. If you found this conversation valuable, please leave a rating or review on Apple Podcasts.
About the Guest
Dr. Keith Humphreys is a Professor at Stanford University and a leading expert on addiction treatment and policy. He has served as a senior advisor for drug policy in the White House and has assisted multiple US administrations. His research focuses on how both laws and community organizations can work together to help people recover from substance use disorders.
Episode Highlights:
01:00 The Luck of Finding a Career
Keith shares how a chance meeting at a fast-food job led him to addiction research. He originally took the job because it paid better than flipping burgers. This moment started a career dedicated to understanding why the human brain chooses drugs over basic needs like food.
Keith shares how a chance meeting at a fast-food job led him to addiction research. He originally took the job because it paid better than flipping burgers. This moment started a career dedicated to understanding why the human brain chooses drugs over basic needs like food.
03:40 A Historic Drop in Overdoses
Recent data shows the largest decline in overdose deaths ever recorded in the United States. Keith explains that this drop happened because the drugs on the street became weaker and less available. This suggests that international pressure on drug production is actively saving lives.
Recent data shows the largest decline in overdose deaths ever recorded in the United States. Keith explains that this drop happened because the drugs on the street became weaker and less available. This suggests that international pressure on drug production is actively saving lives.
10:33 The Oregon vs. Portugal Experiment
Many people thought following Portugal's path of changing drug laws would help the US West Coast. Keith explains that Oregon failed because it removed the pressure for people to seek treatment. Portugal still uses the law and social circles to guide people toward help.
Many people thought following Portugal's path of changing drug laws would help the US West Coast. Keith explains that Oregon failed because it removed the pressure for people to seek treatment. Portugal still uses the law and social circles to guide people toward help.
15:44 Social Pressure vs. The Law
Laws are important, but the opinions of friends and family often have a bigger impact on behavior. Keith points out that we care more about what our neighbors think than we do about getting a ticket. This social bond is a powerful tool for preventing drug use from getting out of control.
Laws are important, but the opinions of friends and family often have a bigger impact on behavior. Keith points out that we care more about what our neighbors think than we do about getting a ticket. This social bond is a powerful tool for preventing drug use from getting out of control.
19:19 Why Group Support Works
Programs like Alcoholics Anonymous provide a community that medical professionals alone cannot replace. Keith discusses how sharing stories and having peers who understand the struggle creates hope and accountability. It shows that there are many different paths to recovery.
Programs like Alcoholics Anonymous provide a community that medical professionals alone cannot replace. Keith discusses how sharing stories and having peers who understand the struggle creates hope and accountability. It shows that there are many different paths to recovery.
32:42 The Future of Addiction Science
Researchers are looking at how new medications for diabetes and weight loss can help stop drug cravings. Keith also highlights the importance of prevention for young people to stop addiction before it starts. He believes technology can now help us predict and prevent crises before they happen.
Researchers are looking at how new medications for diabetes and weight loss can help stop drug cravings. Keith also highlights the importance of prevention for young people to stop addiction before it starts. He believes technology can now help us predict and prevent crises before they happen.