We, the Publisher and Editor of Nutritional Neuroscience, are issuing an Expression of Concern for the following article:
“The effects of probiotics on mental health and hypothalamic–pituitary–adrenal axis: A randomized, double-blind, placebo-controlled trial in petrochemical workers,” Nutritional Neuroscience, 19:9, 387-95, DOI: 10.1179/1476830515Y.0000000023
Since publication of this article, serious concerns have been raised about the integrity of the reported methods, results and analysis. We have contacted the authors and the ethics committee of the institution to respond to the concerns raised and they are cooperating with the investigation. However, the authors have not been able to provide the original data associated with this article, and so as we continue to work through the issues raised, we advise readers to interpret the information presented in the article with due caution. We will provide an update following the conclusion of our investigation. The authors have been notified about this Expression of Concern.