EMF-Portal | Effects of the 1900 MHz electromagnetic field emitted from cellular phone on nocturnal melatonin secretion

Effects of the 1900 MHz electromagnetic field emitted from cellular phone on nocturnal melatonin secretion med./bio.

By: Jarupat S, Kawabata A, Tokura H, Borkiewicz A

Published in: J Physiol Anthropol Appl Human Sci 2003; 22 (1): 61-63

Aim of study (acc. to editor)

To study the effects of the 1900 MHz electromagentic field emitted from cellular phone on nocturnal melatonin secretion.

Background/further details

Salivary melatonin was collected at 19:00 h and 2:00 h; for 30 min every hour from 19:00 h and 1:00 h the subjects used a cellular telephone continuously.

Endpoint

Exposure

1,900 MHz

mobile communications
PHS

Exposure	Parameters
Exposure 1: 1.9 GHz Exposure duration: intermittent for 30 min/h for 6 h	power density: 2.5 mW/cm² SAR: 0.68 W/kg average over mass (whole body) (0.453-0.680 W/kg) magnetic flux density: 0.6 µT unspecified

Exposure 1

Main characteristics

Frequency	1.9 GHz
Type	electromagnetic field
Exposure duration	intermittent for 30 min/h for 6 h

Exposure setup

Exposure source	cellular phone
Distance between exposed object and exposure source	0 cm
Setup	Subjects stayed in a climatic chamber with the receiver directly attached to the left ear.
Additional info	On one day the receiver emitted an EMF, while on sham day there was no emission. The subjects did not know the exposure condition.

Parameters

Measurand	Value	Type	Method	Mass	Remarks
power density	2.5 mW/cm²	-	-	-	-
SAR	0.68 W/kg	average over mass	-	whole body	0.453-0.680 W/kg
magnetic flux density	0.6 µT	unspecified	-	-	-

Exposed system:

human
partial body: ear

Methods Endpoint/measurement parameters/methodology

Investigated system:

isolated bio./chem. substance

Investigated organ system:

neuroendocrine system

Time of investigation:

during exposure
after exposure

Main outcome of study (acc. to author)

Study character:

medical/biological study
experimental study
full/main study

Study funded by

not stated/no funding

Shrivastava A et al. (2014): Effect of mobile usage on serum melatonin levels among medical students

Lerchl A et al. (2008): Effects of mobile phone electromagnetic fields at nonthermal SAR values on melatonin and body weight of Djungarian hamsters (Phodopus sungorus)

Wood AW et al. (2006): Does evening exposure to mobile phone radiation affect subsequent melatonin production?

Burch JB et al. (2002): Melatonin metabolite excretion among cellular telephone users

Radon K et al. (2001): No effects of pulsed radio frequency electromagnetic fields on melatonin, cortisol, and selected markers of the immune system in man

de Seze R et al. (2001): Evaluation of the Health Impact of the Radio-Frequency Fields from Mobile Telephones

de Seze R et al. (1999): Evaluation in humans of the effects of radiocellular telephones on the circadian patterns of melatonin secretion, a chronobiological rhythm marker

Heikkinen P et al. (1999): Chronic exposure to 50-Hz magnetic fields or 900-MHz electromagnetic fields does not alter nocturnal 6-hydroxymelatonin sulfate secretion in CBA/S mice

Mann K et al. (1998): Effects of pulsed high-frequency electromagnetic fields on the neuroendocrine system