I made a test for transmitter substances. Where the substances: Serotonin and Dopamine were compared. You probably heard about that you can do tests to see which one of the substances you've most of. And I got 86% on the Serotonin and only 14% of Dopamine. And I read about the different effects these substances have on the human body, I thought it was very correct on how I feel. http://en.wikipedia.org/wiki/Serotonin http://en.wikipedia.org/wiki/Dopamine Crackpot link removed They question is: Do you think the levels of the different neurotransmitter substances determine how you actually feel? And can they affect how you feel in a large proportion? (Because I really do think it's something with it)..