Danish and Brazilian researchers conducted a study on the effects of salt (NaCl) on respiratory viruses, including COVID-19. They found that inhaling micronized salt reduced cough duration in mild COVID-19 cases. The research suggests that salt may impact virus replication by depleting crucial ATP molecules.
While promising, applying these findings to human treatment is complex. For more details, read the full article (in Danish) here: Read Article (Respiratorisk Tidsskrift, Jan. 2023)