Prebiotic Effects on Gut Microbiota, Gut Comfort and Immune Function

Inclusion Criteria: * Age ≥ 40 and ≤ 55 years * Male/female * Total score of \>2 on the Gastrointestinal Symptom Rating Scale (GSRS) * Body Mass Index 18-30 kg/m2 * Stable body weight (± 5%) for at least 6 months * Stable lifestyle and dietary habits within the 4 weeks prior and during study period * Owns device (computer, smartphone, tablet) with access to the internet * Adequate fluency in the English language to understand the inform consent process, study instructions and study assessments * Sufficient vision and hearing to complete study procedures * Willing and able to participate, follow the study procedures and to give written informed consent Exclusion Criteria: * History (\< 6 months prior to the study) or presence of severe gastrointestinal, metabolic, immunological, psychiatric disorder, or major surgery * Current or past (\< 4 weeks) use of prescription, over-the-counter, or traditional medication, or dietary supplements with a relevant impact on GI system or on visceral motility * Having received antibiotic treatment \< 4 weeks prior to study * Alcohol intake \>1 units/day * Currently pregnant or pregnancy in past 6 months * Use of pro/prebiotics \< 4 weeks prior to study start * Fully vegetarian/vegan diet \< 4 weeks prior to study start * High habitual vegetable and fruit intake (\> 2 servings of fruits and \>2 servings of vegetables per day) \< 4 weeks prior to study start * Lactose intolerance * Maltodextrin allergy * Members of the research team or their immediate family members. Immediate family member is defined as spouse, parent, child, or sibling, whether biological or legally adopted