Increased cortical thickness and decreased brain age among special operations veterans with blast TBI after a magnesium-ibogaine protocol.
Level 4 - case-series / case-control
Uncontrolled pre-post observational study (case series) without a comparator group.
PubMed 41883580 · doi:10.1016/j.isci.2026.115121
What was done
An observational study evaluated 30 Special Operations Forces veterans with prior blast-induced traumatic brain injury (TBI) receiving ibogaine co-administered with magnesium. Structural T1-weighted MRIs were collected at baseline (n = 25), immediately post-treatment (n = 25), and 1 month post-treatment (n = 22). Longitudinal analyses evaluated changes in cortical thickness, subcortical volumes, and predicted brain age (pBA).
What was found
At 1 month post-treatment relative to baseline, predicted brain age decreased by 1.3 years. Cortical thickness significantly increased across 11 brain regions, and subcortical volume significantly expanded across 8 regions (specific regional point estimates and confidence intervals were not provided in the abstract).
Why it matters
This study provides preliminary human imaging evidence linking an ibogaine-magnesium protocol with structural brain changes and reduced biological brain age estimates in veterans with blast-induced TBI.
Limits
The study lacked a control or placebo group, preventing causal attribution and leaving results vulnerable to expectation bias and regression to the mean. The sample size was small with attrition at follow-up (22 completed the 1-month scan out of 30 enrolled). Follow-up was limited to 1 month. T1-weighted structural MRI measurements can reflect transient physiological shifts (such as hydration or blood perfusion changes) rather than genuine neuroplastic tissue remodeling. The cohort was restricted to Special Operations Forces veterans with blast TBI, limiting generalizability.
Cited by
- supports Dr. Nolan Williams conducted an open-label trial with no control group testing ibogaine in veterans, including pre- and post-treatment neuroimaging.
- supports Nolan Williams and researchers at Stanford have conducted neuroimaging studies on military veterans receiving ibogaine treatment in Mexico.