Effects of Probiotic Supplementation on Gut Health, Immune Response, and Well-Being

Inclusion Criteria: * Volunteer is healthy at the time of screening according to participant's own statements. * TICS SSCS score ≥ 6. * Male or female aged ≥18 and ≤65 years at the time of screening. * BMI ≥18.5 and ≤29.9 kg/m². * Volunteer is able and willing to comply with the study instructions. * Volunteer is suitable for participation in the study according to the investigator/study personnel. * Voluntary, written informed consent to participate in the study. Exclusion Criteria: * No command of local language. * Currently diagnosed neurological or psychiatric disorders. * Gastrointestinal disorders including irritable bowel syndrome (IBS), inflammatory bowel disease (IBD) or other conditions that might affect the gut environment. * Contraindication or allergy to any ingredient in the verum or Placebo product. * Use of drugs in the previous 4 weeks before the beginning of intervention. * Use of laxatives and labelled pre#and probiotics in the previous 2 weeks before the beginning of intervention. * Participation in another study with any investigational product within 30 days of screening, or less than five elimination half-lives after the last administration of the investigational product (whichever period is longer) or during the study. * History of drug (recreational) or alcohol abuse. * Bowel preparation for investigative procedures in the 4 weeks prior to screening. * Surgical resection of any part of the bowel (excl. appendectomy). * Pregnant or lactating female, or pregnancy planned during study period, or women of childbearing potential who are not using a medically approved form of contraception (at least three months prior to screening). * Regular smoking.