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The effect of L-tryptophan on seasonal affective disorder
R E McGrath1, B Buckwald, E V Resnick
1Department of Psychology, Fairleigh Dickinson University, Teaneck, NJ 07666.
The Journal of Clinical Psychiatry
|April 1, 1990
Abstract:
Serotonin has been implicated in the etiology of seasonal affective disorder (SAD). The authors compared the effect of the serotonergic precursor L-tryptophan, placebo, and artificial evening light on 13 SAD sufferers. L-Tryptophan and light were associated with greater improvement than was placebo, but the antidepressant effects of L-tryptophan and light were not significantly different.