In a recent study of our group, we investigated the effect of bovine colostrum in rabbit gut health: an evaluation of zonulin expression, a junctional protein whose function is to prevent leakage of solutes and water and seals between the epithelial cells, showed that it was higher in the BC 5% group, suggesting increased permeability, which was partially confirmed by the increased expression of GFAP (glial fibrillary acidic protein), a marker of intestinal glial cell, but this result was limited to the duodenum [59]. The gene discussed is GFAP; the disease is breast cancer.