I heard about the beneficial using of bone broth that is rich in collagen for healing leaky tight junction in gut; but I did not find scientific evidence about it, may you help me to find scientific evidence and studies ?
There are no peer reviewed articles on your topic in Pubmed, but there is a Master’s thesis that considers bone broth and gut microbiota in relation to stress.https://bearworks.missouristate.edu/cgi/viewcontent.cgi?article=4308&context=theses
and a number of perr-reviewed papers on peptides and gut epithelial integrity: https://pubmed.ncbi.nlm.nih.gov/28174772/