Giron et al. (n = 60 COVID-19, 20 healthy controls) supported this by associating high levels of zonulin in the gut, as well as LPS binding protein (LBP) and β-glucan in the blood, with severe COVID-19 and mortality, indicating that gut permeability and microbial translocation may play a role in pathogenesis [133]. Here, LBP is linked to COVID-19.