Safety of PEMF
Will PEMF therapy cause cancer?
I often get emails with questions about safety of PEMF's versus EMF’s.
Genuine PEMF devices make use of pulsed frequencies which are under 100 Hz and as such are classified as Extremly Low Frequencies (ELF).
PEMF's are very low frequency pulsed energy waves in the range of 1 Hz to 50 Hz.
Electro-Magnetic Fields should not to be compared to 50/60 Hz electromagnetic radiation around high voltage power lines and transformers, which induce a continuous electromagnetic field.
Behavior of these electromagnetic fields is different than that of PEMF and warnings should be taken seriously because they are indeed correct.
Short wave diathermy therapy devices are used by physiotherapists for internal body warming. These devices are not PEMF devices because they generate a frequency of 27 MHz (27.000.000 Hz). Exposure to these frequencies for longer periods is potentially harmful and this is the reason why short wave diathermy therapy is only applied for short time periods.
High frequency cell phones operate on frequencies higher than 800 MHz (800.000.000 Hz) and it is still questionable if cell phones can cause cancer.
I am sure that discussions will go on for many years still and possibly not even then firm conclusions can be drawn. At this stage no firm proof exists that cell phones stimulate cancer growth and current recommendations are not to let children use cell phones for long time periods because the device is held close to the brain.
Microwave ovens operate on 2.45 GHz (2.450.000.000 Hz) and are dangerous if applied directly to the eyes and testis because blood flow in these organs is limited and thus is unable to reduce the heating effect of microwaves.
That's why your microwave stops working if the door is opened and the energy is switched off.
Heating of the food is the result of molecular friction
PEMF is completely safe and does not cause cancer if the pulsed frequencies do not exceed 100 Hz. PEMF devices generating higher frequencies might be dangerous and any exposure should be avoided, even for short time durations.