The American Journal of Medicine had an intriguing article about people with difficult-to-regulate thyroid disease.
Researchers at the University of Vermont studied patients with hypothyroidism (low-functioning thyroid) who were on thyroid replacement therapy. In many people it is easy to dial in the proper thyroid hormone regimen, but in some this can be very difficult.
When the Vermont researchers looked at this latter group they discovered a large number had previously undiagnosed celiac disease.
Since celiac disease alters absorption of nutrients it can also lead to poor absorption of medications.
Once the celiac disease was treated, the patients’ thyroid condition came under smooth control.