Gluten-free diet showed a modest symptom improvement in a selected schizophrenia subgroup
An inpatient trial found modestly lower motivation and pleasure symptom scores among people with elevated anti-gliadin antibodies. It did not demonstrate a cognitive benefit.
Based on the published abstract. The full paper may contain additional methods, results and limitations.
The 30-second takeaway
The gluten-free group had a modest reduction in motivation and pleasure symptom scores compared with the gluten-containing group. This trial did not demonstrate improved cognition. Its findings concern a selected inpatient subgroup with elevated anti-gliadin antibodies; larger, longer studies are needed to confirm the symptom result and clarify its practical importance.
This abstract-based account covers a small, short trial in a selected antibody-positive group. The abstract gives no symptom-score difference or cognitive effect estimate with uncertainty, limiting judgments about the size and importance of either effect.
What researchers found
Motivation and pleasure symptoms (CAINS MAP scale)
Gluten-free versus gluten-containing diet over 5 weeks; p = 0.035. The abstract does not report the size of the score difference.
What the symptom result measured
The primary assessment used the motivation and pleasure component of a negative-symptom interview. A change on this scale is a specific symptom finding and does not establish improvement across all aspects of schizophrenia.
Biological findings need separate interpretation
The diet groups also differed in kynurenine pathway metabolites and some brain measurements. Changes in kynurenic acid and symptom scores were correlated, but that relationship does not establish why the symptom scores changed.
The original publication
Randomized double-blind inpatient study of a gluten-free diet for negative symptoms in people with schizophrenia.
Kelly DL, Lee CM, Vyas G et al.
Schizophr Res · 2026
- PubMed ID
- 41544406
- Record checked
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