The Effect of L-Tryptophan on Daytime Sleep Latency in Normals: Correlation with Blood Levels
George C, Millar T, Hanly P, Kryger M. The Effect of L-Tryptophan on Daytime Sleep Latency in Normals: Correlation with Blood Levels. Sleep 1989, 12: 345-353. PMID: 2669092, DOI: 10.1093/sleep/12.4.345.Peer-Reviewed Original ResearchConceptsSleep latencyBlood levelsRandom double-blind fashionRapid eye movement (REM) sleepDaytime sleep latencyL-tryptophan's effectsDouble-blind fashionEye movement sleepL-tryptophanSlow-wave sleepL-tryptophan levelsObjective sleepiness measuresKynurenic acidMovement sleepHealthy volunteersWave sleepDrug conditionsSeparate daysSleepSleepiness measuresPlaceboSignificant correlationEssential amino acidsDoseUrine