Low levels of Serotonin, many doctors have found that patients with low levels of Serotonin suffered from depression. Serotonin can affect moods, which can lead to disorders.
It controls all parts of the body. It receives and interprets messages from all parts of the body and sends out instructions. The three main components of the central nervous system are the brain, spinal cord and neurons.
Amphetamine, Methamphetamine, Caffiene, Ephedrine, Nicotine, Cocaine, <span>Methylenedioxymethamphetamine (MDMA or Ecstasy)</span>
I don't see what the "following" is but what ever it is the answer is most likely abstinence.