Plasma Tryptophan Concentration in Depressive Illness and Mania
- 1 March 1976
- journal article
- Published by Royal College of Psychiatrists in The British Journal of Psychiatry
- Vol. 128 (3), 255-258
- https://doi.org/10.1192/bjp.128.3.255
Abstract
Summary Total and free plasma tryptophan levels were measured in depressive and manic patients before and after recovery. No change was found in total or free plasma tryptophan concentration on recovery from depressive illness. Free plasma tryptophan levels were higher in recovered manics than in active manics, and a group of four manic patients tested before and after recovery showed a significant increase in free plasma tryptophan concentration on recovery.Keywords
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