Pre-probiotic Supplementation for Post-covid Fatigue Syndrome

Inclusion Criteria: * Age 18 - 65 years * Covid-19 positive test within last 3 months (as documented byvalid PCR or antigentest * Moderate-to-severe fatigue (20-MFI test total score \> 43.5) * At least one of additional covid-19 related symptoms (anosmia,ageusia,breathingdifficulties,lungpain, body aches, headaches, difficulties concentrating etc.) Exclusion Criteria: * Other pulmonary and cardiovascular conditions * History of dietary supplement use during the past 4 weeks * Organic gastrointestinal (GI) disorders such as inflammatory bowel disease, coeliac disease, eosinophilic disorders, or current infection of the GI tract. * Bowel surgery or short bowel syndrome. * Medication or supplement which can impact the gut microbiome, including: antibiotics, antimicrobials, or antifungals in the two months * Probiotic or prebiotic supplements in the last 4 weeks