Source : Health unlocked
“Smoking depletes serotonin production in the brain. When serotonin levels in the brain are balanced it creates a happy and contented state of mind. When serotonin levels are low a depressed and anxious state of mind is created. It is believed that smoking cigarettes can deplete serotonin levels by up to 50%. What compounds this problem is that the brain accepts the chemicals in a cigarette as a serotonin substitute on the basis that any chemical response is better than no chemical response at all. So therefore, when an individual stops smoking, serotonin production improves and the brain begins to compensate itself for lost serotonin production. The brain then produces more serotonin than needed, resulting in vivid dreams and nightmares.
Research has shown that it takes the brain 3 weeks to regulate serotonin levels.
Further research suggests that with an increase in serotonin levels there must be an increase in oxygen levels too. When a person stops smoking, carbon monoxide no longer takes priority over oxygen on the red blood cells. As a result of this change, oxygen levels of the individual increase. More oxygen is carried around the body and to the brain. When the stop smoker sleeps there is a higher percentage of oxygen reaching the brain than when they were a smoker. This process helps promote a process called rapid eye movement (REM) while sleeping. REM is an important process in dream production along with serotonin production.”
