Using a random number generator, 56 patients meeting inclusion criteria with IBS or IBS/FD were randomly assigned to either the intervention group (28 individuals) or the control group (28 individuals) (Table 2). Non-functional causes for the symptoms were excluded by a detailed evaluation of the medical history, physical examination, extensive panel of blood tests, stool analysis, and colonoscopy with biopsies.~Diarrhoea-predominant IBS patients (IBS-D) and mixed bowel habits IBS patients (IBS-M) were treated with smooth muscle antispasmodics. The constipation-predominant IBS patients (IBS-C) were treated with smooth muscle antispasmodics and laxatives. IBS/FD patients were treated with smooth muscle antispasmodics and proton pump inhibitors.~At Visit 1, all patients were randomly assigned into two groups. In the intervention group (Group 1), the supplement Standart Zdorovya GASTRO (1 capsule, 730 mg, once a day) was added to the standard treatment regimen for 30 days. In the control group (Group 2), placebo (1 capsule, 730 mg, once a day) was added to the standard treatment regimen for 30 days (Table 1). Researchers and patients were not informed who received a supplement or placebo. During the 30 days of the study, three outpatient visits were conducted (Visit 1 - Day 1, Visit 2 - Day 15 + 2 days, and Visit 3 - Day 30 + 2 days).~Symptom severity was assessed on each visit using 7x7 questionnaire [Ivashkin, V., Sheptulin, A., Shifrin, O., Poluektova, E., Pavlov, C., Ivashkin, K., Drozdova, A., Lyashenko, O., Korolev, A., 2019. Clinical validation of the 7 × 7 questionnaire for patients with functional gastrointestinal disorders. J. Gastroenterol. Hepatol. 34, 1042-1048. https://doi.org/10.1111/jgh.14546], on 1 and 3 visits stool samples were collected for the qualitative and quantitative composition of the intestinal microbiota based on 16S rRNA gene sequencing.~The study protocol was approved by the Ethics Committee of the Mental Health Research Center, Moscow, Russian Federation (No. 418 dated 01/31/2018) and written informed consent was obtained from all participants.
The purpose of this study is to assess the efficacy and safety of a food supplement with standardized menthol, limonene, and gingerol content in patients with irritable bowel syndrome (IBS) or IBS/functional dyspepsia (FD).