Therefore, if you're planning a long journey, you should always apply for the Russian visa before you leave. It's possible to get a tourist visa support at any moment before your journey, however, you can only apply for a tourist visa not earlier than 90 days before the date of your first entry to Russia.
Serotonin is a common neuromediator in the brain. It belongs to the group of so-called biogenic amines, relatively simple chemicals that facilitate the transfer of signals between the cells of the body.
The following is a list of things that it is thought that serotonin could affect: 1  Bowel function. Most of the body's serotonin is found in the gastrointestinal tract where it regulates bowel function and movements. 2  Mood. It is most well know for its role in the brain where it plays a major part in mood, anxiety and happiness. 3  Clotting.