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pubmed:abstractText |
Among 8 primary depressives, 4 schizophrenics, 4 manics and 4 normal controls, 5-hydroxytryptophan (5-HTP), the precursor of serotonin (200 mg p.o.), appears devoid of any stimulating activity on the liberation of growth hormone (GH). So, 5-HTP test can not be useful as a specific neuroendocrine marker of serotoninergic metabolism in depressive patients.
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