http://biopsychiatry.com/curcumin.htm
"...Curcumin (10-80 mg/kg, i.p.) dose dependently... increased serotonin (5-hydroxytryptamine, 5-HT) as well as dopamine levels (at higher doses), and inhibited the monoamine oxidase enzymes (both MAO-A and MAO-B, higher doses) in mice..."
theoretical synergy between curcumin and MAO B inhibitors (selegeline and azilect). both result in higer levels of serotonin.