If you've searched the internet for tips on how to fight the winter blues, you've probably been advised to buy a therapy lamp. So, you may be wondering what research says about whether they are effective and how they work.
Light also stimulates your visual system, regulating activity in the so-called circadian pacemaker. This is the suprachiasmatic nucleus (SCN), a small region of the brain. The SCN gets direct input from the retina and is also packed with melatonin receptors.
There have been many studies examining light therapy in SAD with mixed and contradicting results. However, data from all these studies can be combined and examined using meta-analyses to give a more accurate overall picture. A meta-analysis merges the findings of several independent studies.
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