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“Oral administration of the serotonin (5-HT) precursorl-5-hydroxytryptophan (5-HTP), 200 mg, significantly increased plasma cortisol levels in man.l-5-HTP had no significant effect on the plasma prolactin levels.”
“The second cortisol sample at 0930 revealed a significant enhancing effect for L‐5‐HTP on the postdexamethasone cortisol values in melancholic patients, whereas no effects were detected in minor depressives.”