5-hydroxytryptamine is a neurochemical prepared in the brain, even though it is primarily present in the enterochromaffin cells of the stomach digestive tract (90% of the body’s total serotonin supply), where it controls intestinal movements (Berger M, et al., 2009). 
Tryptophan hydroxylase, a building essential amino acidity prohibit to health proteins in the enterochromaffin cells, forms serotonin.
Most the body’s mind cells tend to be relying on serotonin, including those that regulate the individual s rest practices, memory, mood, appetite, learning abilities, and other aspects of the person s conduct, including sexuality.For this reason, this substance is popular considered a contributor to the human feeling of happiness (Young, 2007).
In addition, health specialists have also figured serotonin plays a very significant character as a control of milk production in the breasts.
In this regard, lots of experts emphasised that imbalanced serotonin levels may influence mood in a way that usually leads the individual to experiencing depression along with other psychological anomalies, such as loss of memory, feeling of anxiety, excessive frustration, panic attacks, as well as obsessive-compulsive disorder.The unbalance which generates these glitches is generated an amount of biochemical factors, including shortage in tryptophan chemical (component of the serotonin), low mind mobile manufacturing of 5HT, deficiency of receptor sites that can receive 5HT, as well as inability of the substance to reach structure sites (ibid). This research has led to the emergences new advanced treatments of depression and other cerebral problems, utilizing drugs to increase brain serotonin function.
Because Teenage (2007) indicated, the implications of increased 5HT for mood and also behaviour need further research, as researchers have not yet found the method to determine serotonin levels in the mind. However, 5HT values in the blood can be measured.
In addition, experts have certainly not been capable to determine if decreases in serotonin result depression, or experiencing depression produces the decreases 5HT levels.
In addition, there are a variety of food products that contain the compounds necessary to increase of tryptophan levels.
According to nutritionist Elizabeth Somer, by the consumption of high required protein foods, individuals overflow their blood with tryptophan and other competing amino acids, all “battling for entry into the brain. Which means only a a small amount of tryptophan gets through -- as well as serotonin levels don't rise”. However, eating foods full of carbohydrates high food increases the body’s insulin releases, facilitating the intake blood amino acids into the body, but definitely not the mind.Eating with high levels of vitamin B-6 can help boost the levels of tryptophan which changes into 5HT (ibid.).