What is shift work sleep disorder?

The condition of insomnia is distinct. Contrary to widespread belief, a lack of melatonin rarely contributes to sleep problems.
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According to the FDA, it is highly uncommon for people to get addicted to sleep aids like Modafinil (Provigil).
There are many all-natural sleep aids available. Modafinil has been shown to enhance both short- and long-term memory in healthy individuals. You may find everything and everything at any time and from anywhere.

Google will tell you what shift work disorder is.
Why post a question thread and then post a load of crap