We thought that gold epitomized serotonin pretty well. It’s a warm color, like the warm feeling you get when your brain starts pumping out lots of this particular neurotransmitter. The ring pairs well with any of the other pieces in our neurotransmitter category. Or you could go nuts and pair it with something from the physics section *gasp*! Also, this ring would make a great gift for: Rebels and rule-followers alike,Behavioral scientists,Yoga instructorsand Starry-eyed pre-med students.