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Trytophan References Levitan, R.D., et al. Preliminary randomized double-blind placebo controlled trial of tryptophan combined with fluoxitine to treat major depressive disorder: antidepressant and hypnotic effects. J Psychiatry Neurosci 2000 25(4): p.337-46). Demisch K., Bauer J., and Georgi, K. Treatment of severe chronic insomnia with L-tryptophan and varying sleeping times. Pharmacopsychiatry, 1987. (20) (6); p.245-8). Booij L, Van der Does AJ, Haffmans PM, Riedel WJ. J Affect Disord, 86(2): 305-11). Riedel, W. et al. Brain, Behavior, and Immunity, Oct. 2002 Sandyk R "L-Tryptophan in neuro psychiatric disorders, a review" Int. J. Neuroscience 1992 67:24-144. Young SN, Teff KL "Tryptophan availability, 5HTP synthesis and 5HT function" Prog. Neuro Psychopharmacol and Biol Psyshiat 1989; 13:373-79. Maurizi CP, "The therapeutic potential for tryptophan and melatonin" Med. Hypoth 1990; 31:233-42. Van Praag HM et al "Therapeutic indications for serotonin potentiating compounds, a hypothesis" Biol Psychiat 1987; 22:205-12. Van Praag HM "In search of the action of antidepressants, 5HTP, tyrosine mixtures in depression" Neuropharmacol 1983; 22:433-40. | 
