Popular Over the Counter Sleep Aid May Prevent Cancer Treatment Side Effects A study in rats shows the potential for melatonin, an over-the-counter hormone supplement, to protect the intestines of cancer patients undergoing radiation treatment

An over-the-counter hormone supplement called melatonin, typically made from animal pineal glands or synthesized in a laboratory, was tested on rats in the present study to see if it would be able to protect the intestines of rats treated with radiation.

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