I came across an advertisement for the movie The Thyroid Secret, which claims (sic caps):
[Shocking] 1 in 3 Americans Have Thyroid Disease And Are Often Told That They are Crazy, Fat or Lazy, When In Fact They Are Just Sick. A 34-Year-Old Rebel Pharmacist Takes On The Broken Healthcare System To Reveal Why You Might Be Overweight, Tired, Depressed and Anxious and Why Your Doctor Can't Help You, Even If They Know You Have Thyroid Disease.
After a preliminary search, I have a couple of possible counter-claims:
- The Colorado Thyroid Disease Prevalence Study, Canaris et al., Archives of Internal Medicine, Vol 160, 2000.
If the Colorado experience can be generalized, there may be in excess of 13 million cases of undetected thyroid gland failure nationwide.
More than 12 percent of the U.S. population will develop a thyroid condition during their lifetime. An estimated 20 million Americans have some form of thyroid disease. [emphasis mine]
So, a quick google search indicates that perhaps 5-12% of Americans might have a thyroid disease, not 33%.
Is there evidence to support the claim that actual rates of thyroid disease approach 1 in 3 for Americans?