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To: Joe Btfsplk who wrote (345882)	1/26/2010 10:47:38 PM
From: alanrs	Respond to of 793970

I read a study some years ago that targeted the back of the knees as being particularly effective. Something about the blood flow being close to the skin. Don't know if this is the article, just the first one that mentioned it on a search. Along with the inevitable disclaimer about not trying this at home if you're prone to doing really dumb things. ARS columbia.edu excerpt: "Although an early study comparing light exposure to the eyes and to the skin found that light to the eyes has the greatest therapeutic effect for people with SAD, a recent study indicates that circadian rhythms (the body's biological clock) can be affected by light exposure to the back of the knee. While this finding will certainly lead to further research, it would be premature to draw conclusions about the potential effects of skin illumination on SAD symptoms. Also, people should take note that exposure to ultraviolet (UV) light, given off by the sun and by tanning lamps, can lead to other health problems, such as skin cancer. People with SAD should definitely not try to "self-medicate" by exposing their skin to potentially hazardous UV illumination." Edit: This might be the article, first one on page, if someone had access to Science Mag. and was interested. Seems to be a fair amount of info published about the effect. sciencemag.org