Rethinking Addiction: How New Research is Shaping the Way We Understand the Brain, Recovery, and Stigma
Addiction been described as a “chronic brain disease” for decades. This framing shifted public conversation away from moral blame and towards medical care. Now, researchers across many disciplines, like neuroscience, psychology, philosophy, and public health are taking a closer look at what that label means. However, it is unsure whether this disease model ideology tells a complete whole story. This evolving discussion matters for people in recovery and their families, clinicians, students, researchers, and policymakers alike; how we define addiction shapes how we treat it, fund it, and talk about it.
The Brain Disease Model: What It Changed
In 1997, Dr. Alan Leshner, then National Institute on Drug Abuse (NIDA) director, asserted that addiction should be understood as a brain disease because repeated substance use produces lasting changes in brain structure and function.¹ His work as NIDA director helped catalyze a major shift in research funding, clinical approaches, and public messaging. Federal agencies such as NIDA and the National Institute on Alcohol Abuse and Alcoholism (NIAAA) continue to highlight substance use disorders as predominately chronic medical conditions that stem from measurable changes in brain circuits that regulate reward, stress, and self-control.²,³ Collective research has supported the biological disease model with evidence that repeated substance use can alter neural pathways responsible for motivation, decision-making, and behavioral control, making it harder for people to stop despite negative consequences². This scientific framing helped reduce the idea that addiction is simply a matter of willpower. It supported insurance coverage, medication development, and increased research investment. It also emphasized that recovery is possible because the brain is capable of change a concept known as neuroplasticity.³
New Questions: Is “Brain Disease” Enough?
While neuroscience has advanced significantly, some researchers argue that the phrase “brain disease” may oversimplify a complex condition. Dr. Hanna Pickard, a philosopher, has called for “agnosticism and heterogeneity,” suggesting that addiction varies widely across individuals and may not fit a single disease model in every case.⁴ She argued that identifying brain changes does not automatically establish disease in a strict medical sense. A 2025 interdisciplinary review in The Lancet Psychiatry similarly questions whether the term “brain disease” is used consistently in scientific and public discourse.⁵ The authors distinguish between a “narrow” definition and a broader one, noting that ambiguity complicates research and public communication. Earlier work in Frontiers in Psychiatry also suggested that addiction may be better understood as a deeply learned pattern shaped by experience, motivation, and environment rather than as a disease in the same way as neurodegenerative disorders.⁶
Social Context and Structural Factors
Addiction does not occur in isolation. Researchers increasingly emphasize the importance of trauma, inequality, stress exposure, and social environment in shaping vulnerability and recovery. A 2017 article in Nature Human Behaviour cautioned that focusing too narrowly on biology could divert attention from structural and social contributors to substance-related harm.⁷ These broader determinants—including housing instability, poverty, discrimination, and limited access to healthcare—play meaningful roles in both risk and recovery. At the same time, other scholars argue that neuroscience remains an essential component of understanding addiction. A 2020 article in Neuropsychopharmacology defended a revised brain-based model while advocating for “consilience” the integration of biological, psychological, and social perspectives.⁸
What About Stigma?
One of the motivations behind framing addiction as a brain disease was the hope that it would reduce stigma. However, research suggests the relationship between scientific framing and stigma is complex. A 2024 study found that moral explanations of addiction were strongly associated with higher stigma, while disease models did not consistently reduce negative perceptions.⁹ Public health research on alcohol-related stigma highlights the importance of respectful, person-first language and recovery-oriented messaging.¹⁰
Why This Matters Now
The way addiction is framed influences prevention strategies, treatment access, insurance reimbursement, criminal justice reform, and public policy. Increasingly, researchers argue that effective responses integrate neuroscience, trauma-informed care, and community-based prevention. For people in recovery and their families, this balanced approach recognizes biological processes while affirming resilience and the importance of supportive environments.
Looking Ahead
Rather than asking whether addiction is only a brain disease or not a brain disease, many researchers now focus on integration how neuroscience, trauma-informed care, and community-based prevention can work together. The shared goal remains clear: reduce harm, expand access to care, support long-term recovery, and build policies grounded in evidence and compassion.
Written by Emmanuel Alvarez ea472@ubhc.rutgers.edu
References
1. Leshner, A. I. Addiction is a brain disease, and it matters. Science 278, 45–47 (1997). https://doi.org/10.1126/science.278.5335.45
2. National Institute on Drug Abuse. Drugs, Brains, and Behavior: The Science of Addiction (National Institutes of Health, 2020).
3. National Institute on Alcohol Abuse and Alcoholism. Neuroscience: The Brain in Addiction and Recovery (National Institutes of Health, 2023).
4. Pickard, H. Is addiction a brain disease? A plea for agnosticism and heterogeneity. Psychopharmacology 238, 983–995 (2021). https://doi.org/10.1007/s00213-021-06013-4
5. Blithikioti, C. et al. Reevaluating the brain disease model of addiction. Lancet Psychiatry (2025). https://doi.org/10.1016/S2215-0366(25)00060-4
6. Lewis, M. Addiction is not a brain disease (and it matters). Front. Psychiatry 4, 24 (2013). https://doi.org/10.3389/fpsyt.2013.00024
7. Henden, E., Melberg, H. O. & Røgeberg, O. J. Viewing addiction as a brain disease promotes social injustice. Nat. Hum. Behav. 1, 0055 (2017). https://doi.org/10.1038/s41562-017-0055
8. Heilig, M. et al. Addiction as a brain disease revised: why it still matters, and the need for consilience. Neuropsychopharmacology 46, 1715–1723 (2021). https://doi.org/10.1038/s41386-020-00950-y
9. Rundle, S. et al. Examining the relationship between public stigma, models of addiction, and addictive disorders. Addict. Res. Theory 33, 123–135 (2024). https://doi.org/10.1080/16066359.2024.2365156
10. Morris, J. & Schomerus, G. Why stigma matters in addressing alcohol harm. Drug Alcohol Rev. 42, 1374–1382 (2023). https://doi.org/10.1111/dar.13660