Study type: Medical/biological study (observational study)

Long-term (up to 20 years) effects of 50-Hz magnetic field exposure on blood chemistry parameters in healthy men. med./bio.

Published in: Clin Biochem 2012; 45 (6): 425-428

Aim of study (acc. to author)

To study the effects of long-term exposure (1-20 years) on clinical blood chemistry in workers chronically exposed to electromagnetic fields both at work and at home.

Background/further details

The exposure and the control groups comprised 15 subjects each. The exposed volunteers worked in extra high voltage substations (225 kV and 400 kV) and lived nearby under power lines. Their main tasks included installing couplings between extra high voltage Iines and voltage transformers. Blood samples were taken hourly from 20 h to 8 h.



Exposure Parameters
Exposure 1: 50 Hz
Exposure duration: continuous for 1-20 years

Exposure 1

Main characteristics
Frequency 50 Hz
Exposure duration continuous for 1-20 years
Exposure setup
Exposure source
Additional info extra high voltage substations (occupational) and power lines (residential exposure) of a 225 kV and 400 kV electricity transmission network
Measurand Value Type Method Mass Remarks
magnetic flux density 0.72 µT mean - - -
magnetic flux density 0.64 µT mean - - during daytime
magnetic flux density 0.82 µT mean - - during nighttime (residential)

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Time of investigation:
  • after exposure

Main outcome of study (acc. to author)

The data suggest that long-term exposure to 50 Hz magnetic fields (exposure > 0.3 µT) in healthy men could induce some biological modifications of certain blood parameters (sodium, chloride, phosphorus, glucose). The clinical relevance of these findings needs further investigation.

Study character:

Study funded by

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