Clinical Research Directory

Probiotic Research: Open-label Functional Intervention and Longitudinal Evaluation in Healthy Adults

This study is a pre-post, open-label cohort study designed to investigate how a food-grade probiotic supplement affects biological measurements and wellbeing in healthy adults. Participants will take one capsule daily for either 1 month or 6 months. During the study, participants will complete online cognitive tasks and provide blood and stool samples collected during home visits by trained staff. The samples will be analysed to explore changes in gut bacteria and other biological markers. This study aims to understand whether the supplement is well tolerated and whether measurable biological changes occur. The study does not involve any experimental drugs or invasive procedures beyond blood sampling and stool collection, and participants will not be asked to change any current prescribed medications or treatments; with eligibility exclusions applying for recent antibiotics or immunosuppressants. The supplement is being studied for research purposes only and is not intended to diagnose, treat, or prevent disease. Participants will be invited to participate in a follow-up visit to assess long-term effects.

Probiotic in Fruit Snack

The aim of this study is to investigate whether a fruit snack containing probiotic ''Lactobacillus rhamnosus'' can survive and establish itself more effectively in the gut when it is protected inside a natural plant-protein coating and delivered in a fruit snack. Lactobacillus rhamnosus is a beneficial bacterium that may support gut health and influence communication between the gut and the brain. In this study, we will examine how the probiotic affects the gut microbiome (the community of bacteria that naturally live in the gut). We are recruiting 25 healthy men and women aged 25-65 years with a body mass index (BMI) between 18.5 and 31.9 kg/m². Participants will be randomly assigned to receive either: A) Fruit snack containing encapsulated Lactobacillus rhamnosus probiotics, or a similar fruit snack that does not contain probiotics (placebo). Neither participants nor researchers (blinded) will know which snack is being provided during the study. Participants will attend four study visits over approximately 10 weeks (70 days): at the baseline visit Day 0 and again at Days 28, Day 42, and Day 70. A blood and stool samples will be collected at the beginning of the study, and samples will be used to assess changes in the gut microbiome over time. The findings from this study will help us better understand how targeted delivery of probiotics to the gut may influence the gut microbiome and support digestive health.