5. Nibibanziriza serotonine mu mubiri kandi igahinduka muri serotonine, bityo bikagira ingaruka ku bwonko bwa neurotransmitter. Imwe mumikorere yingenzi ya 5-HTP nukongera serotonine. Serotonine ni neurotransmitter igira uruhare runini mugutunganya umwuka, ibitotsi, ubushake bwo kurya, no kumva ububabare.