Monday, November 10, 2008

Genetic link for SAD

Past research has shown that seasonal affective disorder (SAD) tends to run in families. Researchers at the Uniformed Services University in Bethesda, Maryland, looked into the links between SAD and variations in genes responsible for the production of a hormone called melanopsin, which is produced in response to light and affects the body clock. The researchers found that people with SAD were more than five times as likely to have a particular variation of a gene called P10L responsible for the production of melanopsin.

You can find out more about this research at

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