Some experts believe that bipolar magnets are more effective, while others believe that unipolar magnets are the way to go.
Polarity is one of the most controversial issues within the field of
magnet therapy. Regardless of the polarity issue, experts agree that
magnets work.
The term bipolar refers to a biomagnet (healing magnet) that allows both poles – north and south – to face the body at the same time. Many Eastern European studies were performed by researchers that showed positive results using magnets that were bipolar and placed in a checkerboard pattern.
Magnetite beads used in magnetic jewelry are bipolar, as are the neodymium magnets you can use to create your own jewelry. When wearing this type of jewelry, both poles face the body at the same time.
A true unipolar magnet does not exist; however, unipolar refers to a biomagnet that is used in such a way that only one pole – either north or south (but not both) – faces the body, while the opposite pole faces away from the body.

Even though a neodymium magnet is bipolar (as are all magnets) when placed in the back of stainless steel and titanium link magnetic jewelry, the magnets are arranged so that only one pole, typically the north pole, faces the body. In this application the neodymium magnet is said to be a unipolar magnet.
Some experts feel that unipolar magnets have a greater depth of penetration. I feel that it has more to do with the magnet strength. A neodymium magnet is the strongest permanent biomagnet available. Whether it is used as a bipolar magnet or a unipolar magnet, I feel it offers the greatest depth of penetration, because of its strength.
I have personally benefited by wearing both bipolar and unipolar magnetic jewelry. Magnet therapy is a holistic remedy that can assist your body’s natural magnetism to balance and achieve holistic health.