High or Low intensity PEMF will pass completely through the body. Human biology evolved in the magnetic fields of the earth and is affected by and responds to a vast range of magnetic field intensities. The difference is the amount of the charge in the magnetic field will stimulate your tissues as it is passing through the body. This fast magnetic charge will excite the damaged cells in the body to open up and flush out the detoxification with in the cell. Only high voltage machines can do this.
Essentially, higher PEMF voltage is more effective when low voltage isn’t enough. High voltage PEMF also produces a sensation that patients can actually feel which helps reassure them the device is working.