Research suggests that myo-inositol may offer modest benefits for OCD symptoms, with the most direct support coming from a small double-blind crossover randomized controlled trial that found significant symptom reduction compared to placebo, and several narrative and systematic reviews that characterize the evidence as preliminary but encouraging. Studies indicate that inositol's potential effects may be linked to its role in cellular signaling pathways involving serotonin-coupled receptors, which also underlie the action of commonly prescribed OCD medications, and animal model research broadly supports this mechanistic rationale. However, the overall evidence base is limited in important ways: a 2014 meta-analysis pooling data from multiple trials found no statistically significant effect of inositol on obsessive-compulsive symptoms, and a 2022 systematic review found that while mitochondria-influencing compounds as a class outperformed placebo, inositol individually did not show a strong signal compared to N-acetylcysteine. Taken together, the research remains inconclusive — existing studies are small, methodologically variable, and insufficiently powered to support firm conclusions, and experts across multiple reviews have consistently called for larger, well-designed trials before myo-inositol can be confidently characterized as an effective intervention for OCD.
Citations from PubMed and preprint sources. Match score (0-100) reflects automated search ranking, not clinical appraisal.
| Title | Type | Year | Direction | Match |
|---|---|---|---|---|
| Inositol treatment of obsessive-compulsive disorder. | RCT | 1996 | Supports | 99 |
| Nutraceuticals in the treatment of obsessive compulsive disorder (OCD): a rev... | Review | 2011 | Supports | 97 |
| Controlled trials of inositol in psychiatry. | RCT | 1997 | Supports | 97 |
| Defining the neuromolecular action of myo-inositol: application to obsessive-... | Review | 2002 | Supports | 95 |
| A meta-analysis of inositol for depression and anxiety disorders. | Meta-analysis | 2014 | Mixed | 92 |
| The Therapeutic Effects of Dietary Supplements on OCD: A Narrative Review. | Other | 2026 | Supports | 90 |
| The effects of inositol treatment in animal models of psychiatric disorders. | Review | 2001 | Supports | 90 |
| Mitochondrial modulators for obsessive-compulsive and related disorders: a sy... | Meta-analysis | 2022 | Mixed | 88 |
| Complementary medicine, self-help, and lifestyle interventions for obsessive ... | Systematic review | 2012 | Supports | 88 |
| Herbal and dietary supplements for treatment of anxiety disorders. | Review | 2007 | Supports | 82 |
| Inositol--clinical applications for exogenous use. | Review | 1998 | Supports | 78 |
| Clinician guidelines for the treatment of psychiatric disorders with nutraceu... | Meta-analysis | 2022 | Mixed | 75 |
| Epi-inositol and inositol depletion: two new treatment approaches in affectiv... | Other | 1999 | Supports | 65 |
| Drug Treatment of Trichotillomania (Hair-Pulling Disorder), Excoriation (Skin... | Systematic review | 2019 | Supports | 62 |
| Management of treatment resistant obsessive-compulsive disorder. Algorithms f... | Review | 2002 | — | 60 |