evidence: Inhalation of camphor, cloves (lavang), carron seeds (ajwain seeds) are the latest home remedies to increase oxygen levels to prevent COVID-19, according to viral messages doing the rounds on social media. But similar to all the other remedies, even this mixture of camphor and ajwain seeds wrapped in a handkerchief does not have any scientific evidence backing this claim. [...] The viral message reads, "Camphor, lavang, ajwain , few drops eucalyptus oil. Make a potli and keep smelling it throughout the day and night. Helps increase oxygen levels and congestion. This potli is also given to tourists in Ladakh when oxygen levels are low. Many ambulances are now keeping these too. It's a home remedy. kindly share and help." This message comes at a time when India is ramping up its oxygen production due to widespread reports of oxygen shortage resulting in the death of patients. [...] BOOM could not find any scientific papers propagating the use of camphor, ajwain seeds on increasing oxygen levels. While camphor is used in Ladakh, its role in increasing oxygen there is due to the belief that as oxygen levels in higher altitudes decrease, the camphor helps in clearing the nasal pathway and assists in breathing. Several mountaineering and trekking groups insist that people carry adequate camphor with them.