Gut health clinical trials

This trial is now closed to new participants

Thank you for your interest in this clinical trial. Recruitment for this study has now finished, and we are no longer accepting new participants.

If you’ve already taken part or registered your interest, our team will continue to support you as usual. If you were hoping to join, we understand this may be disappointing — but don’t worry, we regularly run new trials across a range of health conditions.

Please see our current available trials below.

About gut health research

Interest in the gut microbiome has grown substantially over the past decade, both in research and in the public conversation. The community of microorganisms living in the digestive system appears to interact with digestion, immune function and other aspects of health in ways that are still being mapped.

Why gut health research matters

This is a field where the gap between claim and evidence is unusually wide. Products described as supporting gut health are widely available, but relatively few have been assessed in properly controlled clinical studies. Research in this area exists to establish what actually holds up under scrutiny.

Studies typically examine whether a specific preparation produces a measurable effect in a defined group of people, over a defined period, compared against a control. That is a narrower question than the general claims often made about gut health, and answering it properly is what distinguishes clinical research from marketing.

What taking part usually involves

Studies in this area often ask participants to follow a defined routine over several weeks and to provide samples at intervals. Some involve keeping a simple record of diet or symptoms, which the study team explains at the outset.

Visits are usually straightforward and the commitment is generally lighter than in some other therapeutic areas. Taking part is voluntary and you may withdraw at any point without giving a reason.