Night owls may want to dim their lights

Night owls may want to dim their lights

Study finds that that night-time lighting reduces hormone associated with sleep and health

By Janet Raloff, 19:57 PM January 12, 2011

People who spend their evenings in relatively bright light run the risk of stressing their bodies by ratcheting down the production of melatonin. Produced in the brain's pineal gland, this hormone plays a pivotal role in setting the body’s biological clock – and, potentially, in limiting the development of certain cancers.

More than 100 young adults volunteered for a roughly 10-day research trial during which each took turns living in a light-controlled room at Brigham and Women’s Hospit...

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