<<Disclaimer: Verify this information before applying it to your situation.>> There have been some questions about hypothyroidism and celiac.This is my humble understanding as a nurse. If your hypothyroidism is due to an autoimmune disease-called Hashimoto's disease- in which the autoimmune system destroys the thyroid then the relationship is that when one has one autoimmune disease they are subject to others as all those genes are one Chromosone 6 and when one is mixed up, others are too. More information can be obtained from the Gluten Intolerance Group, CSA or The Thyroid Foundation of America, Inc. Ruth Sleeper Hall 350, Parkman Street, Boston MA 02114-2698. From information from The Thyroid Foundation, there is a blood test for antibodies against the thyroid. The most senstive test if antithyro-peroxidast test. In my practice, most docs run a thyroid panel which includes TSH, T3 T4 and free T4. TSH is a stimulating hormone produced by the pituitary gland which makes the thyroid gland produce more hormone. Usually in Hashimoto's disease the TSH is very high as it is trying to make the thyroid gland. Often the thyroid gland located in the neck by the adams apple is swollen. T3 T4 and free T4 are hormones from the thyroid. In the beginning these may be normal but later as the thyroid gland is destroyed they become low. The treatment is usually taking a thyroid preparation daily. There are a couple on the market now due a lawsuit by the consumers to the company that made synthroid. Some people have very good results from therapy and others do not. Hope this helps.