Daniel Amen
Dr. Daniel Amen is a researcher and author working in the field of neuroimaging and psychiatric health. His published research focuses primarily on using brain single-photon emission computed tomography (SPECT) imaging to assess regional cerebral blood flow and neural connectivity. His work investigates functional brain imaging biomarkers across psychiatric and neurological conditions, including major depressive disorder, schizophrenia, ADHD, cognitive disorders, and the effects of adverse childhood experiences.
60 claims checked on air: 7 context 2 contradicted 6 overstated 36 supported 9 unverified
What they said on air - citing their own research
8 citing their own research
Dr. Amen scanned and evaluated 300 NFL players in a study starting in 2009 and found high levels of brain damage.
"I did the big NFL study starting in 2009. We scanned and treated 300 NFL players: high levels of damage." (said at 0:24:15)
Dr. Amen and colleagues initiated an ongoing longitudinal study in 2009 evaluating active and retired NFL players using SPECT perfusion neuroimaging and clinical evaluations. Published findings from this cohort reported significant hypoperfusion across 36 brain regions consistent with traumatic brain injury in 161 NFL players compared to 124 healthy controls, and a pilot open-label intervention study evaluated and treated 30 players. The certainty is low due to observational and open-label study designs.
A study by Daniel Amen in the Journal of Alzheimer's Disease found that overweight and obese NFL players had lower blood flow in the prefrontal cortex compared to normal-weight players.
"So I actually did a study—I published a study in the Journal of Alzheimer's Disease in my NFL group, and we looked at NFL players who were overweight or obese versus those who were at a healthy weight. The overweight and obese one had low blood flow in their prefrontal cortex" (said at 0:59:30)
Daniel Amen published a study in the Journal of Alzheimer's Disease (2020) examining regional cerebral blood flow via brain SPECT scans across BMI categories (underweight, normal weight, overweight, obese, morbidly obese). The study showed that higher BMI correlated with reduced cerebral blood flow across virtually all brain regions, including the prefrontal cortex and areas implicated in Alzheimer's disease. However, the speaker conflated this study with his earlier NFL cohort work: the published Journal of Alzheimer's Disease study on obesity and cerebral blood flow was conducted in a general adult psychiatric cohort of 17,721 participants (35,442 scans), not specifically in his NFL player group. As an observational cross-sectional imaging study from a private clinic network, the body of evidence provides low certainty.
Former NFL player Ed White lost 150 pounds participating in Dr. Daniel Amen's NFL weight loss group.
"And we did an NFL weight loss group, which was so much fun for me. I had Big Ed White become Little Ed White. He lost 150 pounds, which was really fun." (said at 1:00:00)
No published record matching the claim that former NFL player Ed White lost 150 pounds in Dr. Daniel Amen's weight loss group was located; this does not prove the claim false. Dr. Amen published a study detailing an open-label multi-component intervention in 30 retired NFL players that included weight loss where appropriate (PMID 21615001), but individual player identities and specific weight loss figures such as 150 pounds were not reported in peer-reviewed publications.
A published study by Daniel Amen examining 35,000 brain scans found a linear correlation where higher body weight was associated with decreased blood flow across virtually every brain region.
"I published a study last year on 35,000 scans showing there was, David, a linear correlation: as your weight went up, blood flow to virtually every area of your brain went down." (said at 1:00:52)
A 2020 cross-sectional study by Daniel Amen and colleagues analyzed 35,442 brain SPECT scans from 17,721 adults in a psychiatric clinic cohort across different BMI categories. The study reported that higher BMI was significantly correlated with decreased cerebral blood flow (hypoperfusion) during both resting and concentration tasks across virtually all 128 brain regions examined. Because this was a retrospective, cross-sectional observational study in a self-selected clinical population, it demonstrates association rather than direct causation.
Hyperbaric oxygen therapy significantly improves cerebral blood flow in military personnel who suffered blast injuries.
"I published a study in the Journal of Neurotrauma on soldiers who had blast injuries: significant improvements in blood flow with hyperbaric oxygen." (said at 0:12:25)
A preliminary phase I clinical trial published in the Journal of Neurotrauma evaluated 16 military personnel with blast-induced mild-to-moderate traumatic brain injury/post-concussion syndrome and post-traumatic stress disorder treated with 40 sessions of 1.5 ATA hyperbaric oxygen therapy (HBOT). Single-photon emission computed tomography (SPECT) statistical parametric mapping analysis showed diffuse, statistically significant improvements in regional cerebral blood flow after 1 and 40 sessions. However, the evidence certainty is very low because the study was a small, open-label, uncontrolled pilot trial without a sham control group.
Meditation increases blood flow and neural activity in the frontal lobes.
"And meditation, which actually fooled us because, you know, you'd think meditation, it would calm everything down in the brain. Absolutely doesn't do that, especially in your frontal lobes; it increases blood flow and activity." (said at 0:12:38)
Functional neuroimaging and cerebral blood flow (CBF) studies demonstrate that meditation engages and increases neural activation and blood flow in frontal lobe regions, particularly the prefrontal cortex and anterior cingulate, rather than inducing generalized cerebral deactivation. Single photon emission computed tomography (SPECT) studies show significant increases in regional cerebral blood flow in the dorsolateral prefrontal cortex, orbital frontal cortex, and cingulate gyrus during meditation, as well as higher baseline prefrontal CBF in experienced meditators. Coordinate-based fMRI meta-analyses similarly confirm consistent activation of fronto-medial and prefrontal networks during meditative practices, reflecting active attentional and executive control processes.
- supports: The measurement of regional cerebral blood flow during the complex cognitive task of medit… (Psychiatry research 2001) · cited 495x in the literature
"Significantly increased rCBF (P<0.05) was observed in the cingulate gyrus, inferior and orbital frontal cortex, dorsolateral prefrontal cortex (DLPFC), and thalamus. The change in rCBF in the left DLPFC correlated negatively (P<0.05) with that in the left superior parietal lobe. Increased frontal rCBF may reflect focused concentration and thalamic increases overall increased cortical activity during meditation." (abstract, results, passage verified)
pubmedfull study (doi) - supports: Cerebral blood flow differences between long-term meditators and non-meditators. (Consciousness and cognition 2010) · cited 107x in the literature
"The CBF of long-term meditators was significantly higher (p<.05) compared to non-meditators in the prefrontal cortex, parietal cortex, thalamus, putamen, caudate, and midbrain." (abstract, results, passage verified)
pubmedfull study (doi) - supports: A neurocognitive model of meditation based on activation likelihood estimation (ALE) meta-… (Consciousness and cognition 2012) · cited 90x in the literature
"To test this hypothesis, we conducted a quantitative meta-analysis based on activation likelihood estimation (ALE) of 10 neuroimaging studies (91 subjects) on different meditative techniques to evidence the core cortical network subserving meditation. We showed activation of basal ganglia (caudate body), limbic system (enthorinal cortex) and medial prefrontal cortex (MPFC)." (abstract, results, passage verified)
pubmedfull study (doi)
Ninety-four percent of traumatic brain injuries affect the frontal lobes.
"so of traumatic brain injuries, 94% of them affect the frontal lobes" (said at 0:32:48)
The speaker claims that 94% of traumatic brain injuries (TBIs) affect the frontal lobes. This statistic originates from a systematic review evaluating the clinical utility of single-photon emission computed tomography (SPECT) in TBI (Raji et al., 2014). The systematic review found that across cross-sectional brain SPECT imaging studies of TBI patients, the frontal lobes were the most common region showing neuroimaging abnormalities (94% of cross-sectional studies reported frontal lobe abnormalities, and 77% reported temporal lobe abnormalities).
However, stating that 94% of all traumatic brain injuries affect the frontal lobes misrepresents what the statistic actually measures. The 94% figure refers to the proportion of cross-sectional SPECT studies in a systematic review that identified frontal lobe perfusion abnormalities among evaluated TBI patients, not a epidemiological population measure that 94% of all clinical TBI incidents involve frontal lobe injury.
Eighty percent of retired NFL players treated with Dr. Amen's intervention program demonstrated cognitive improvement.
"This is what we used on our NFL players, and 80% of our players—we published this—80% of our players show improvement when we put them on this program" (said at 0:33:31)
The speaker accurately cites the findings from their published open-label clinical trial in 30 retired NFL players. In the study, retired players underwent an average of 6 months on a multi-component intervention (lifestyle changes, fish oil, and brain-directed dietary supplements) and demonstrated significant improvements across multiple cognitive domains on the MicroCog assessment (corrected for practice effects) and increased cerebral perfusion on brain SPECT. Because the study was a small, open-label, uncontrolled before-and-after case series, the certainty of evidence for the intervention's causal efficacy is very low.
Fact-checked episodes
Publications
- Examining comorbid and transdiagnostic depression clinical outcomes across anxiety, autism, attention deficit hyperactivity disorder (ADHD), bipolar disorder, depression, and schizotypal personality groups: a novel NeuroMark SPECT approach.medRxiv : the preprint server for health sciences 2026 · CEBM Level 4
- A Replicable NeuroMark Template for Whole-Brain SPECT Reveals Data-Driven Perfusion Networks and Their Alterations in Schizophrenia.Neuroinformatics 2026 · CEBM Level 4
- Classifying schizophrenia patients and healthy individuals: Whole brain SPECT functional connectivity using support vector machine classification.Neuroimage. Reports 2026 · CEBM Level 4
- Functional vs Structural Cortical Deficit Pattern Biomarkers for Major Depressive Disorder.JAMA psychiatry 2025 · CEBM Level 4
- Predicting Regional Cerebral Blood Flow Using Voxel-Wise Resting-State Functional MRI.Brain sciences 2025 · CEBM Level 4
- A multi-site 99m Tc-HMPAO SPECT study of cerebral blood flow in a community sample of patients with major depression.Translational psychiatry 2024 · CEBM Level 4
- Adverse childhood experiences, brain function, and psychiatric diagnoses in a large adult clinical cohort.Frontiers in psychiatry 2024 · CEBM Level 4
- SPECT Functional Neuroimaging Distinguishes Adult Attention Deficit Hyperactivity Disorder From Healthy Controls in Big Data Imaging Cohorts.Frontiers in psychiatry 2021 · CEBM Level 4
- A New Way Forward: How Brain SPECT Imaging Can Improve Outcomes and Transform Mental Health Care Into Brain Health Care.Frontiers in psychiatry 2021 · CEBM Level 5
- Patterns of Regional Cerebral Blood Flow as a Function of Obesity in Adults.Journal of Alzheimer's disease : JAD 2020 · CEBM Level 4
- Deficits in Regional Cerebral Blood Flow on Brain SPECT Predict Treatment Resistant Depression.Journal of Alzheimer's disease : JAD 2018 · CEBM Level 4
- Patterns of Regional Cerebral Blood Flow as a Function of Age Throughout the Lifespan.Journal of Alzheimer's disease : JAD 2018 · CEBM Level 4
- Discriminative Properties of Hippocampal Hypoperfusion in Marijuana Users Compared to Healthy Controls: Implications for Marijuana Administration in Alzheimer's Dementia.Journal of Alzheimer's disease : JAD 2017 · CEBM Level 4
- Classification of Depression, Cognitive Disorders, and Co-Morbid Depression and Cognitive Disorders with Perfusion SPECT Neuroimaging.Journal of Alzheimer's disease : JAD 2017 · CEBM Level 4
- Quantitative Erythrocyte Omega-3 EPA Plus DHA Levels are Related to Higher Regional Cerebral Blood Flow on Brain SPECT.Journal of Alzheimer's disease : JAD 2017 · CEBM Level 4
- Gender-Based Cerebral Perfusion Differences in 46,034 Functional Neuroimaging Scans.Journal of Alzheimer's disease : JAD 2017 · CEBM Level 4
- Perfusion Neuroimaging Abnormalities Alone Distinguish National Football League Players from a Healthy Population.Journal of Alzheimer's disease : JAD 2016 · CEBM Level 4
- Functional neuroimaging with default mode network regions distinguishes PTSD from TBI in a military veteran population.Brain imaging and behavior 2015 · CEBM Level 4
- Functional Neuroimaging Distinguishes Posttraumatic Stress Disorder from Traumatic Brain Injury in Focused and Large Community Datasets.PloS one 2015 · CEBM Level 4
- Clinical comparison of 99mTc exametazime and 123I Ioflupane SPECT in patients with chronic mild traumatic brain injury.PloS one 2014 · CEBM Level 4
- Clinical utility of SPECT neuroimaging in the diagnosis and treatment of traumatic brain injury: a systematic review.PloS one 2014 · CEBM Level 1
- It's time to stop flying blind: how not looking at the brain leads to missed diagnoses, failed treatments, and dangerous behaviors.Alternative therapies in health and medicine 2013 · CEBM Level 4
- Multi-site six month outcome study of complex psychiatric patients evaluated with addition of brain SPECT imaging.Advances in mind-body medicine 2013 · CEBM Level 3
- Effects of brain-directed nutrients on cerebral blood flow and neuropsychological testing: a randomized, double-blind, placebo-controlled, crossover trial.Advances in mind-body medicine 2013 · CEBM Level 2
- Daniel Amen, MD: healing brain injury and damage from environmental toxins. Interviewed by Karen Burnett.Advances in mind-body medicine 2013 · CEBM Level 5
- A phase I study of low-pressure hyperbaric oxygen therapy for blast-induced post-concussion syndrome and post-traumatic stress disorder.Journal of neurotrauma 2012 · CEBM Level 4
- Daniel Amen, MD: the impact of brain imaging on psychiatry and treatment for improving brain health and function. Interview by Karen Burnett.Alternative therapies in health and medicine 2012 · CEBM Level 5
- The clinical utility of brain SPECT imaging in process addictions.Journal of psychoactive drugs 2012 · CEBM Level 5
- Specific ways brain SPECT imaging enhances clinical psychiatric practice.Journal of psychoactive drugs 2012 · CEBM Level 4
- Impact of playing American professional football on long-term brain function.The Journal of neuropsychiatry and clinical neurosciences 2011 · CEBM Level 4
- Elevated BMI is associated with decreased blood flow in the prefrontal cortex using SPECT imaging in healthy adults.Obesity (Silver Spring, Md.) 2011 · CEBM Level 4
- Reversing brain damage in former NFL players: implications for traumatic brain injury and substance abuse rehabilitation.Journal of psychoactive drugs 2011 · CEBM Level 3
- Brain SPECT Imaging in Complex Psychiatric Cases: An Evidence-Based, Underutilized Tool.The open neuroimaging journal 2011 · CEBM Level 5
- Cerebral blood flow differences between long-term meditators and non-meditators.Consciousness and cognition 2010 · CEBM Level 4
- High resolution brain SPECT imaging in a clinical substance abuse practice.Journal of psychoactive drugs 2010 · CEBM Level 5
- Brain SPECT imaging in clinical practice.The American journal of psychiatry 2010 · CEBM Level 5
- Cerebral blood flow changes during chanting meditation.Nuclear medicine communications 2009 · CEBM Level 3
- A comparative analysis of completed suicide using high resolution brain SPECT imaging.The Journal of neuropsychiatry and clinical neurosciences 2009 · CEBM Level 4
- Omentum transposition surgery for patients with Alzheimer's disease: a case series.Neurological research 2008 · CEBM Level 4
- Predicting positive and negative treatment responses to stimulants with brain SPECT imaging.Journal of psychoactive drugs 2008 · CEBM Level 4
- Preliminary evidence differentiating ADHD using brain SPECT imaging in older patients.Journal of psychoactive drugs 2008 · CEBM Level 4
- An analysis of regional cerebral blood flow in impulsive murderers using single photon emission computed tomography.The Journal of neuropsychiatry and clinical neurosciences 2007 · CEBM Level 4
- High-resolution brain SPECT imaging and eye movement desensitization and reprocessing in police officers with PTSD.The Journal of neuropsychiatry and clinical neurosciences 2005 · CEBM Level 4