Bensafi M, Tsutsui T, Khan R, Levenson RW, Sobel N, Helen Wills Neuroscience Institute, 3210 Tolman Hall MC 1650, University of California at Berkeley, Berkeley, CA 94720, USA. bensafi@uclink.berkeley.edu 

Publication date: November 2004
https://pubmed.ncbi.nlm.nih.gov/15288708/

In short: Pheromones improve mood and are responsible for olfactory communication in humans.