dice form the words serotonin and melatonin. beautiful blue background, grey table.

antidepressant biology brain depression disease emotion health care medical mental mind mood psychology research routine schedule science scientific sleep spiritual stress therapy word chemistry cycle daily dice happiness hormone insomnia night psychological chemical cube drug happy supplement lifestyle symbol mentality rhythm concept cortisol hormonal melatonin monoamine rythm seratonin serotonergic form words serotonin beautiful blue background grey table copy space melatonin table