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Scientists have discovered a unique receptor in the adult brain that helps regulate moods.  The receptor occurs in a region called the “medial habenula” which is also involved in nicotine addiction and pain.




N-methyl-D-aspartate (NMDA) receptors are involved in directing brain function and requires two different neurotransmitter molecules to bind to it and become activated, namely:

  • Glycine
  • Glutamate


This particular receptor that was found only needs glycine to activate it.  This may be a big reason why some react adversely to glycine and others not.




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