For a brief overview of the correlation between neurotransmitters and mental health, watch the video below. Experience-sadness, sleeping and eating issues, withdrawal, feelings of hopelessness, loss o...For a brief overview of the correlation between neurotransmitters and mental health, watch the video below. Experience-sadness, sleeping and eating issues, withdrawal, feelings of hopelessness, loss of interest/pleasure, lack of energy, feelings of worthlessness/guilt, slowed processing, trouble concentrating, frequent thought of suicide/death, anxiety, and unexplained health problems.