Relation of body mass index and waist-to-height ratio to cardiovascular disease risk factors in children and adolescents: the Bogalusa Heart Study. Freedman DS, Kahn HS, Mei Z, Grummer-Strawn LM, Dietz WH, Srinivasan SR, Berenson GS. [PubMed-indexed for MEDLINE].
Smelling salts release ammonia (NH3) gas, which triggers an inhalation reflex (that is, causes the muscles that control breathing to work faster) by irritating the mucous membranes of the nose and lungs. Although these hypothetical mechanisms have been discussed, it is likely that smelling salts are not effective.
Both the herb and the Essential oil are used in the bath salts. Peppermint = Smells like peppermint candy in my Melt and Pour soaps; somewhat milder, yet clean smell in the bath salts. Bath Salts uses finely ground peppermint herb and the Essence and Fragrance oils. A very good deodorizer for bath and hands.