The magnets are Rare-Earth Neodymium-iron-boron (NdFeB) - The second generation of Neodymium rare-earth magnets. They are very strong in comparison to their mass, and have the highest magnetic energy of any permanent magnets. There are no known side effects for using magnetic bracelets, and there is no time limitation for length of time, or the amount & strength of magnets one can wear. Using magnets is non invasive and non addictive.
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