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Is This Peptide a Key to Happiness? University of California, Los Angeles (UCLA) Study  
3/7/2013 7:39:05 AM

What makes us happy? Family? Money? Love? How about a peptide? The neurochemical changes underlying human emotions and social behavior are largely unknown. Now though, for the first time in humans, scientists at UCLA have measured the release of a specific peptide, a neurotransmitter called hypocretin, that greatly increased when subjects were happy but decreased when they were sad.
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