Production of the sleep hormone melatonin begins at dark.

睡眠荷尔蒙褪黑素在夜间开始分泌。

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Researchers have found that light intensity can adjust the clock forward or backward by regulating the hormone melatonin.

研究人员发现，通过增强光亮调节褪黑激素可以将生物钟向前或向后调整。

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The report cited studies that show EMFs can disturb the production of the hormone melatonin, which is linked with sleep patterns.

报告引用研究成果表明电磁辐射可以打乱与睡眠模式相关的褪黑激素的产生。

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One possible explanation was disruption of the sleep hormone melatonin, the researchers said.

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Researchers found that people with CFS produced unusually high levels of the hormone melatonin, which stimulates the immune system and plays an important role in promoting sleep.

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Dr. Sanjay Gupta, CNN chief medical correspondent: You're not likely to have a doctor ever advise giving the sleep hormone melatonin to your teenagers, but sleep experts tell CNN they've seen a tremendous upsurge in the use of melatonin in kids, by parents.

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