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Author (up) Kyba, C.C.M.; Kantermann, T. url  doi
  Title Does ambient light at night reduce total melatonin production? Type Journal Article
  Year 2015 Publication Hormones Abbreviated Journal Hormones  
  Volume Issue Pages  
  Keywords Human Health; melatonin; ambient lighting; indoor light; sleep; *Circadian Rhythm; chronotype  
  Abstract It was with great interest that we read the recent study by Hersh et al on the effects of sleep and light at night on melatonin in adolescents. Of particular interest was their focus on electronic use after “lights out”. The authors highlight the importance of understanding what effects this may have on sleep, citing a survey that showed that 72% of American 13-18 year olds regularly use a cellphone or computer before trying to go to sleep. In their study, Hersh et al1 did not observe a significant suppression in urinary morning melatonin (aMT6s) levels with respect to the use of electronic devices between lights off and sleep onset. Therefore, the authors conclude that “nighttime behaviors of adolescents by and large do not impact urinary melatonin levels”. Absence of evidence, however, is not the same as evidence of absence, and we believe that the authors’ conclusion is premature.  
  Address Deutsches GeoForschungsZentrum GFZ, Telegraphenberg, 14473 Potsdam, Germany; kyba(at)  
  Corporate Author Thesis  
  Publisher Hellenic Endocrine Society Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number IDA @ john @ Serial 1236  
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