In 1963 Tyler and Smith found that this mushroom contains serotonin, 5-HTP and 5-hydroxyindoleacetic acid.
Common ingredients in relaxation drinks may contain kava root, melatonin, valerian root, gamma-aminobutyric acid (GABA), Chamomile, Melissa officinalis, L-Theanine, L-Threonine, 5-Hydroxytryptophan or Passiflora.