Effects of tryptophan intake and light exposure during the daytime on sleep factors

本研究的目的是探讨色氨酸摄入量和光照对睡眠和褪黑素分泌的影响，通过修改色氨酸摄入量在早餐和光照在白天，并测量睡眠质量和褪黑素分泌在晚上。33名男大学生完成了为期5天4夜的实验。受试者被随机分为4组：早晨低甜度早餐（55 mg/餐）和白天弱光环境（<50 lx）、高甜度早餐（476 mg/餐）和弱光环境、低甜度早餐和明亮环境（> 5000 lx）、高甜度早餐和明亮环境。第四天的唾液褪黑激素浓度显着低于第一天在穷人 * 暗淡，而它是在第四天在丰富 * 明亮。研究结果表明，丰富的早餐和白天明亮的光线照射相结合，可以促进夜间褪黑激素的分泌。

The purpose of this study is to investigate effects of tryptophan intake and light exposure on sleep and melatonin secretion, by modifying tryptophan ingestion at breakfast and light exposure during the daytime, and measuring sleep quality and melatonin secretion at night. Thirty three of male University students completed the experiments lasting 5 days and 4 nights. The subjects were randomly divided into 4 groups: tryptophan-poor breakfast (55mg/meal) in the morning and dim light environment (<50lx) during daytime, tryptophan-rich breakfast (476mg/meal) and dim light, tryptophan-poor breakfast and bright light (>5000lx), tryptophan-rich breakfast and bright light. Saliva melatonin concentrations on the fourth day was significantly lower than on the first day in Poor*Dim, whereas it was higher on the fourth day in Rich*Bright. The result indicates that the combination of a tryptophan-rich breakfast and bright light exposure during daytime could promote melatonin secretion at night.