Intestinal Barrier
The living interface that mediates exchange between the intestinal environment and the body.
Research
The intestinal barrier as a dynamic interface.
Research across the biological boundary where the microbiome, nutrition, immunity and the brain meet.
Where the work is leading
Exploratory · 2026A larger research question emerging from Birna’s established work on the intestinal barrier, permeability, the microbiome and gut–brain communication.
Explore Living BoundariesPermeability
The regulated movement of molecules across the intestinal barrier.
Microbiome
Microbial communities and their reciprocal relationship with their host.
Gut–Brain Axis
Bidirectional communication linking intestinal, neural, endocrine and immune systems.