Before one can delve into the connection between serotonin and depression, it is imperative to understand the causes of depression and diagnosis for bipolar disorder. Most of these psychological disorders are often a mixture of genetic, biological and environmental factors. While genetic factors are passed on from generation to generation, biological factors may lie dormant in the individual for a very long time without one knowing about it. Environmental factors play the role of a trigger to activate genetic or biological predispositions. These are often caused by traumatic life events or experiences. Biological Factors Biological factors and causes of depression are the best way to understand the connection between serotonin and depression along with its relation to eustress as well. Serotonin is a neurotransmitter that helps the brain perform various functions including temperature regulation, sleep, appetite, learning, memory, appetite, sexual activity, muscle activity, endocrine regulation and lots more. The importance of serotonin becomes increasingly clear when observing its importance in various bodily functions. However, one of the most important functions of serotonin is mood regulation. Since depression is a mood disorder, it comes as no surprise that low levels of serotonin are often commonly seen in patients suffering from depression. This connection between serotonin and depression is not a rarity as it is seen in most, if not all patients of depression. Serotonin Importance Serotonin goes well beyond controlling mere biological functions as it taps into various psychological factors as well. Mood regulation is one of the most important functions ...

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