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Bioscience, Biotechnology, and Biochemistry
Vol. 62 (1998) No. 4 P 816-817



Food & Nutrition Notes

  Following the administration of theanine, the brain tryptophan content significantly increased or tended to increase, but the contents of serotonin and 5-hydroxyindole acetic acid (5HIAA) decreased. The use of inhibitors of serotonin metabolism enable us to speculate that theanine reduced serotonin synthesis and also increased serotonin degradation in the brain.

Copyright © 1998 by Japan Society for Bioscience, Biotechnology, and Agrochemistry

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