“…Several clinical studies have reported reductions in salivary cortisol levels after behavioral interventions to reduce stress (Aboulafia-Brakha, Suchecki, Gouveia-Paulino, Nitrini, & Ptak, 2014;Galvin, Benson, Deckro, Fricchione, & Dusek, 2006;Miluk-Kolasa, Obminski, Stupnicki, & Golec, 1993). Specifically, saliva contains free, biologically active cortisol as opposed to total cortisol present in serum or plasma.…”