evidence: A message going viral on social media claims that smelling a combination of camphor, cloves (laung), carrom seeds (ajwain) and a few drops of eucalyptus oil can help in increasing oxygen levels in the body. The viral message is accompanied by a photo showing the above-mentioned ingredients on a small white cloth. [...] "It's a myth. Smelling camphor does not increase oxygen levels. Smelling camphor clears blockages in the nasal passage that gives the feeling of better airflow," Dr Agarwal said in a phone conversation to The Quint. [...] Evidently, the claim that smelling camphor, laung, ajwain and eucalyptus oil increases oxygen levels is false. One should also be careful in using it as an inhalant because most of the camphor available in the market is synthetically produced and might cause irritation.