A veteran-led study is documenting how U.S. combat veterans have used microdosing for PTSD — the first of its kind (recruiting; no results yet)

Microdosing Vets is a qualitative, retrospective doctoral study at the California Institute of Integral Studies (CIIS) documenting how U.S. combat veterans aged 21–50 with a PTSD diagnosis have used self-directed LSD microdosing (with or without psilocybin). Participation is a single confidential, remote interview about experiences that already occurred; the study provides no substance and does not direct dosing. It is Ethics-Approved by the CIIS Ethics Board and led by an OIF combat veteran and doctoral researcher. As of this writing the study is actively recruiting and has reported no findings.

As a study in progress, it has no results to weigh, and this entry makes no efficacy claim. By design the study is retrospective and based on self-report from a self-selected group of veterans who were already microdosing, so it is positioned to describe lived experience rather than establish whether microdosing works; it is not a treatment, a trial, or a controlled comparison, and it provides no substance. Its distinctive contribution, as stated by the study, is qualitative and population-specific: it is described as the first study documenting what U.S. combat veterans have actually experienced microdosing for PTSD.

In the largest placebo-controlled microdosing study to date, the microdose group's psychological outcomes improved but the placebo group also improved, with no significant between-group differences (Szigeti et al., 2021). The study describes itself as the first qualitative study documenting what U.S. combat veterans have actually experienced microdosing LSD, with or without psilocybin, for PTSD (microdosingvets.com). This entry describes a study in progress, not evidence; it makes no efficacy claim and is never cited as evidence in this bibliography.