[1]Watson,S.(2021).Dopamine:The pathway to pleasure.Harvard Health;HarvardMedical School.https://www.health.harvard.edu/mind-and-mood/dopa-mine-the-pathway-to-pleasure
[2]Magrone,T.,Russo,M.A.,&Jirillo,E.(2017).Cocoa and Dark Chocolate Polyphe-nols:From Biology to Clinical Applications.Frontiers in Immunology,8.https://-doi.org/10.3389/fimmu.2017.00677
[3]Grebe,N.M.,Kristoffersen,A.A.,Grontvedt,T.V.,EmeryThompson,M.,Kennair,L.E.O.,&Gangestad,S.W.(2017).Oxytocin andvulnerable romantic relationships.Hor-mones and Behavior,90,64-74.https://doi.org/10.1016/j.yhbeh.2017.02.009
[4]Young,S.N.(2007).How to increase serotonin in the human brain without drugs.Journal of Psychiatry&Neuroscience:JPN,32(6),394-399.https://www.nc-bi.nlm.nih.gov/pmc/articles/PMC2077351/