How magnetic fields change the [pH] balance of body fluids?

I would like to know on how magnetic fields change the acid / alkaline [pH] balance of body fluids.

Does anyone have any suggestions?
Thanks in advance for any suggestions

"The acid / alkaline [pH] balance of body fluids
can be altered by magnetic fields; magnetic fields also alter enzyme activity &
biochemical processes with the lower frequencies relieving pain, inflammation
and bruising, using the higher frequencies for the relaxing of blood vessels
allowing increased blood flow for a boost to your natural healing abilities. A
negative magnetic field is used to normalize disturbed metabolic functions
causing painful conditions like inflammation and cell degeneration.
Magnetic fields put directly on top of the head has been
proven to have a calming effect."

Ref : http://www.vitalwonders.com/therapy.htm