From a white paper by Ben Philipson, the inventor of the Curatron Systems.
Only Pulsed electromagnetic fields (PEMF) influence cell behavior by inducing electrical changes around and within the cell
The magnetic field strength of a magnet is related to its size and composition, which determines the depth of penetration of the magnetic fields. There are many therapeutic systems on the market which use permanent magnets made of different materials. These manufacturers often claim field strengths of 4,000 gauss and higher. These values are however not relevant at all, since the measured field strengths of these magnets range from 310 gauss to 2,200 gauss at the surface, at 1-inch distance around 10 Gauss at 3-inch distance absolutely nothing!