TwinsUK researcher awarded international grant to investigate how diet influences gut health
11th June 2026 – by Aaruthy Suthahar
A TwinsUK researcher has been awarded funding through the 2025 Global Grants for Gut Health (GGGH) programme to investigate how diet influences the gut barrier and immune health.
Dr Mario Falchi, Reader in Computational Medicine at King’s College London and researcher with TwinsUK, is one of three international researchers selected for this year’s programme, which supports innovative research into how nutrition affects the gut microbiome and gut barrier function.
His project will examine the complex relationship between diet, gut barrier integrity and immunity using data from the TwinsUK cohort, one of the world’s largest and most deeply characterised twin registries.
The gut barrier acts as a protective lining between the digestive system and the rest of the body, helping to prevent harmful substances from entering the bloodstream while allowing nutrients to be absorbed. Disruption to this barrier has been linked to a range of health conditions, including inflammatory and metabolic diseases.
The study will leverage the unique TwinsUK resource and focus on 1,250 pairs of twins (2,500 participants) to distinguish the effects of genetics from environmental and lifestyle factors that may influence gut barrier health.”
The study will focus on 1,250 pairs of twins, analysing specific metabolomic biomarkers linked to gut barrier integrity and combining these findings with detailed dietary, health and lifestyle information. The research will integrate computational medicine, bioinformatics and laboratory-based analyses to better understand the biological mechanisms involved.
Dr Mario Falchi said:
“The unique design of the TwinsUK cohort allows us to disentangle the effects of genetics from modifiable lifestyle factors in a way that is rarely possible in population studies. By combining detailed dietary information with molecular data, we hope to gain new insights into how nutrition influences gut barrier function and overall health.”
The researchers ultimately aim to identify dietary approaches that could help strengthen the gut barrier, prevent epithelial damage and support immune health.
The Global Grants for Gut Health programme supports research exploring novel interactions between the gut microbiome and human health. This year’s funding call focused on understanding how nutrition can influence the gut microbiome and barrier function, with the goal of improving health outcomes across different populations.
Dr Falchi’s project was recognised alongside studies in Tanzania and Italy investigating how dietary patterns influence gut health, inflammation, cognition and healthy ageing.
Commenting on the award, Dr Falchi said:
“There is growing recognition that the gut plays an important role in many aspects of health. This funding provides an exciting opportunity to use the TwinsUK resource to explore how dietary factors may contribute to maintaining a healthy gut barrier and potentially reducing disease risk.”
The project is expected to generate new insights into the links between nutrition, gut health and immunity, helping to inform future strategies for disease prevention and personalised nutrition.
Read more here: https://www.nature.com/articles/d42473-026-00062-z