During the winter months it seems that a lot of people suffer with Seasonal Affective Disorder.
Bergamot and lemon oils are among the most widely-researched for positive effects on mood. Rodent studies show that lemon oil is antidepressant (Komori et al 1995) and invigorating (Komori et al 2006). It also reduces anxiety and boosts both serotonin and dopamine (Komiya et al 2006), two neurochemicals that are often reduced in SAD. In addition to lemon oil, other essential oils that positively impact dopamine and/or serotonin, and are also antidepressant, include clary sage, Atlas cedarwood, eucalyptus globulus and orange (Costa et al 2013, Kako et al 2008, Martins et al 2015, Seol et al 2010).