Study type: Medical/biological study (experimental study)

The excretion of 6-hydroxymelatonin sulfate in healthy young men exposed to electromagnetic fields emitted by cellular phone - An experimental study med./bio.

Published in: Neuro Endocrinol Lett 2002; 23: 88-91

Aim of study (acc. to author)

To study possible effects of the exposure to electromagnetic fields emitted by cellular phone on 6-hydroxymelatoninsulfate excretion, which reflects melatonin levels in blood.



Exposure Parameters
Exposure 1: 900 MHz
Modulation type: pulsed
Exposure duration: continuous for 60 min

Exposure 1

Main characteristics
Frequency 900 MHz
Exposure duration continuous for 60 min
Modulation type pulsed
Pulse width 576 µs
Repetition frequency 217 Hz
Exposure setup
Exposure source
Setup The subject's head was only kept close to the receiver mounted on a stand without actual conversation.
Additional info Each person was examined (single-blind) with or without exposure on two days at least one week apart.
Measurand Value Type Method Mass Remarks
power density 5 mW/cm² - - - output power
SAR 1.23 W/kg - - - -

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Investigated organ system:
Time of investigation:
  • before exposure
  • after exposure

Main outcome of study (acc. to author)

Mean 6-hydroxymelatoninsulfate contents did not differ significantly for any of the respective time points. Circadian variations of 6-hydroxymelatoninsulfate level were detected in all men.
The data has demonstrated that electromagnetic field emitted by cellular phones has no distinct influence on the melatonin level.

Study character:

Study funded by

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