April 7, 2014  post by MGH Center For Women's Mental Health The active form of vitamin D is produced as a byproduct of natural sun exposure; it can also be in certain foods, including some kinds of fish, egg yolks, and fortified dairy and grain products.  Certain people – those with decreased sun exposure or diets with low vitamin D – may be more vulnerable to vitamin D deficiency.  Low levels of vitamin D have been associated with a spectrum … [Read more...]