L-Tryptophan demonstrates an anti-depressant effect in seasonal affective disorder (SAD).
The effect of L-tryptophan on seasonal affective disorder.
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Key Findings
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.
External References
- PubMed ID:
- 2182615
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