Vitamin D deficiency has become something of a health bugaboo in recent years, especially after a 2009 study that declared three quarters of U.S. adults and teenagers deficient. Low levels of the vitamin–which is manufactured by the body when sunlight hits the skin and can be found in some fatty fish and fortified food products –have been linked to disparate conditions, such as a sluggish immune system and psychosis . [More]













Scientific American - News