A bone seeker is an element, often a radioisotope, that tends to accumulate in the bones of humans and other animals when introduced into the body.
[3] Radioactive bone seekers are particular health risks as they irradiate surrounding tissue, though this can be useful for radiotherapy, such as in the case of radium-223.
[2][4] Stable bone seekers can also be harmful: excessive strontium absorption has been linked with increased levels of rickets.
[5][6] The salt strontium ranelate, however, is a bone seeker which is sometimes used to strengthen bones as a treatment for osteoporosis.
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