Health Harvard and MIT Researchers Find Nasal Mucus May Help Protect Teeth from Cavity-Causing Bacteria by Dr Natalie Singh - Health Editor April 21, 2026 by Dr Natalie Singh - Health Editor April 21, 2026 Scientists from Harvard University and the Massachusetts Institute of Technology have found that compounds in nasal mucus may assist protect teeth by forming a protective layer in the mouth and … 0 FacebookTwitterPinterestEmail