The best replacement for serotonin is dopamine.

The best alternatives to serotonin are rated as following:
★★★★★  dopamine
★★★  melatonin
★★★  norepinephrine
★  endorphins
★  dopamine depression
★  gaba
  serotonin
  dopamine ocd
  cortisol
  acetylcholine
  vkm
  histamine
  tryptophan

Your alternative for serotonin is not listed? Suggest!
Speaking about serotonin, one probably shouldn't forget about medication.

Other search terms related to serotonin and their ratings are:
★★★★★ medication
★★★★ drugs
You have in mind a companion for serotonin and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of serotonin in all years. Click on graph for more.
serotonin
dopamine
melatonin