Hi Terri,
The best of the best I have found is : http://www.nlm.nih.gov/medlineplus/
It is where WierdMed and many others glean their information. You will like it the most, I am sure!
The best site for labtests is: http://www.labtestsonline.org/ another best place to check lab tests and results
Itsme Wayne .... hope this helps!