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  • Title: L-Tryptophan administration in man: effects on gonadotrophin, growth hormone and cortisol secretion and on sexual motivation.
    Author: Hyyppä MT, Falck S, Gävert J, Kytömäki O, Rautakorpi I, Syvälahti E.
    Journal: Monogr Neural Sci; 1976; 3():102-8. PubMed ID: 979991.
    Abstract:
    Long-lasting administration of L-tryptophan in neurologic patients caused a slight reduction of plasma luteinizing hormone levels without modifications of sexual motivation. Plasma follicle stimulating hormone concentrations were not altered by L-tryptophan. Short-lasting loading of L-tryptophan caused a statistically significant increase of plasma growth hormone levels, and a fall of plasma cortisol values in neurologic patients without neuroendocrine disorders. The pattern of plasma cortisol response to L-tryptophan loading was different in patients with neuroendocrine disorders. Plasma gonadotrophins seemed to be slightly reduced after the L-tryptophan loading.
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