Time frame: During the treatment period for 4 weeks from the beginning of the intervention.
Based on the scoring of gastrointestinal symptoms (GSRS) in such a way that the score is calculated as follows: the number of participants with reduced abdominal pain: 0 (no symptoms), 1 (mild means the presence of tolerable symptoms), 2 (moderate means discomfort and interference) in normal activities), 3 (severe means inability to perform normal activities) -- the number of participants with reduced gastrointestinal symptoms: 0 (absence of nausea), 1 (temporary and short periods of nausea), 2 (frequent nausea) and long-term without vomiting), 3 (persistent nausea and frequent vomiting) -- the number of participants with reduced bloating: 0 (no bloating), 1 (short-term and temporary bloating), 2 (long-term but tolerable bloating), 3 (severe flatulence and interference in social functioning)