It have one in my knee and another in my hand- titanium, I think.
Magnets have no negative effects on metal pins of any time located within the body.
The only effect magnetics could have would be the creation of heat in the metal. This would require a magnetic field of much greater strength than that found in consumer magnets such as those sold by Nikken. Another product Nikken has pioneered is far-infrared technology. Far-infrared helps to relax the body and can help neutralize the body's ph. It have one in my knee and another in my hand- titanium, I think.