http://supplementlab.org/focus-zx1/

focus zx1 One theory says they do this to avoid being damaged by too much stimulation. Another theory says that Focus zx1 is just a way for the brain to maintain a normal, balanced state. Whatever the right theory, Down regulation can cause depression even after restoration of serotonin levels. This happens because serotonin can not bind to downregulated receptors. Many ecstasy users report a period of depression that can last for several months, even after they have stopped taking ecstasy. Keep in mind,
http://supplementlab.org/focus-zx1/

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