http://www.theglobeandmail.com/servlet/story/RTGAM.20070608.wvitaminD08/BNStory/specialScienceandHealth/home


“The society says whites should take supplements containing 1,000 international units a day during fall and winter, the six months of the year when sunlight falling on Canada isn't strong enough for skin to fulfill its vitamin D role. Those with dark skin, who don't go outside frequently or wear full body clothing for cultural or religious reasons, such as veiled women, should take 1,000 IU year-round.”

Tea is believed to be an anti-oxidant too.

Not to mention the good old turmeric.