These specialized immune cells express GLP-1 receptors and when GLP-1(whether from native production or GLP-1 agonists) activates these IELs via GLP-1R it helps to suppress localized T-cell induced inflammation
J Neurol Neurosurg Psychiatry 16(4):213226 Greggio E, Bergantino E, Carter D, Ahmad R, Costin G-E, Hearing VJ, Clarimon J, Singleton A, Eerola J, Hellstrm O, Tienari PJ, Miller DW, Beilina A, Bubacco L, Cookson MR (2005) Tyrosinase exacerbates dopamine toxicity but is not genetically associated with Parkinsons disease
People with impaired FMO3 activity either due to genetic variants known to cause trimethylaminuria or due to liver disease have reduced ability to clear TMA
This distinction matters: while it activates the GLP-1 pathway, it simultaneously targets the GIP receptor, a separate hormone system affecting glucose control and appetite