serotonin

definition: a compound present in blood platelets and serum, which constricts the blood vessels and acts as a neurotransmitter.

serotonin is the key hormone that stabilizes our mood, feelings of well-being, and happiness. this hormone impacts your entire body. it enables brain cells and other nervous system cells to communicate with each other. serotonin also helps with sleeping, eating, and digestion.

or: cameron and jack find that their serotonin levels boost when they make the other's life miserable.