Tetrasodium pyrophosphate is a chelating that can bind calcium and help improve olfaction. Tetrasodium pyrophosphate is an antimicrobial agent that can reduce microbial colonization. Tetrasodium pyrophosphate is a biological material that is widely used in life science research. Tetrasodium pyrophosphate can be studied in research for alleviating symptoms post COVID-19[1][2][3].