Despite the wide application of radiation in diagnostics and treatments, there is still no magic material to protect people from radiation exposure. Though Amifostine is developed as a radioprotectant, the FDA approved its application only for the protection of salivary glands. Also it requires repetitive injections to be effective and it can pose severe health threats of systemic toxicity and complications when applied to those under total body irradiation conditions.
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Source: Phys.org