Working the night shift, or the graveyard shift as some might call it, is linked to cancer. It is thought the main problem is the hormone melatonin. It is normally produced at night to suppress tumor development. Light shuts down the production of melatonin.
Yes, because it disrupts our normal sleep rhythm which is linked to melatonin and it is produced when the day turns to night as stated above. The morning sunlight helps in waking us up. Graveyard shifts are linked to heart disease, sleeping problems, as well as cancer.
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