http://blogs.mercola.com/sites/vitalvotes/archive/2006/10/09/BEWARE-of-Most-Prescription-Vitamin-D-Supplements.aspxYou can divide vitamin D supplements into two basic types. Natural ones are D3 and they contain the same vitamin D your body makes when exposed to sunshine . However, nearly all the prescription-based supplements do not contain vitamin D3: They use vitaminenCommunityServer 2008.5 SP1 (Build: 31106.3070)http://blogs.mercola.com/sites/vitalvotes/archive/2006/10/09/BEWARE-of-Most-Prescription-Vitamin-D-Supplements.aspx#85114Thu, 05 Jul 2007 23:34:56 GMT24451277-a5aa-4add-96dc-64081bfd86fa:85114FRUMPOKeep your cod liver oil in the refrigerator.<img src="http://blogs.mercola.com/aggbug.aspx?PostID=85114" width="1" height="1">