American Association of Clinical Endocrinologists (AACE)
American Thyroid Association (ATA)
ArmourThyroid.com
EndocrineWeb.com
Find Online Thyroid Support Groups
GoodHormoneHealth
Hormone Foundation
MyThyroid.Com
National Graves' Disease Foundation
Thyroid Cancer Survivors' Association, Inc.
Thyroid Disease at About.com
Thyroid-Info.com
About.com Health
American Academy of Family Physicians
American Autoimmune Related Diseases Association
American Dietetic Association
American Heart Association
American Psychological Association
Centers for Disease Control and Prevention
CFIDS Association of America
Crohn's and Colitis Foundation of America
eMedicine.com
Endotext.com
Health Central
Healthline
Human Growth Foundation
The International Council for the Control of Iodine Deficiency Disorders
Irritable Bowel Self-Help Group
Lab Tests Online
Lucille Packard Children's Hospital at Stanford University
The Lupus Foundation
The Magic Foundation
MayoClinic.com
MedicineNet
MedlinePlus
National Alopecia Areata Foundation
National Cancer Institute
National Institutes of Health
National Osteoporosis Foundation
National Sleep Foundation
National Women's Health Information Center
North American Menopause Society
Nutrition.gov
Pituitary Network Association
Sjogren's Syndrome Foundation
Synthroid
University of Maryland Medical Center
UptoDate
U.S. Food and Drug Administration
WebMD
Weight Watchers
Wrongdiagnosis.com
By Theodore C. Friedman, M.D., Ph.D. and Winnie Yu