e200921c_sity_of_Michigan_Health_System__Why
[Supplement] 1 Star Peppermint Refer to label instructions [Why] 
Peppermint, a source of small amounts of menthol, is believed to work by acting on receptors in the nasal mucous membranes, leading to a reduction of nasal stuffiness. Eucalyptus oil is often used in a steam inhalation to help clear nasal and sinus congestion. It is said to work similarly to menthol, by acting on receptors in the nasal mucous membranes, leading to a reduction of nasal stuffiness.65 Peppermint may have a similar action and is a source of small amounts of menthol.
Common Cold/Sore Throat (Holistic) | University of Michigan Health System
Why