As an antioxidant, in many studies melatonin has been shown to protect DNA from oxidative damage. Once damaged, DNA may mutate and carcinogenesis may occur. Past research has found a correlation between night workers and an increased risk for breast cancer, further supporting the theory that light at night is a risk factor for leukemia.
Researchers conclude saying that if melatonin levels are altered by magnetic fields, a potential relationship between these fields and cancer, including leukemia, would be possible.
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