What is Hashimoto’s thyroiditis?
Hashimoto’s is an autoimmune disease in which the immune system targets the thyroid gland. Over time it can reduce thyroid hormone production, leading to hypothyroidism. It is one of the most common causes of an underactive thyroid in the United States.
Why “normal” labs can miss the picture
Many people are screened with TSH alone. TSH is valuable, but a fuller evaluation can include total and free T4, total and free T3, reverse T3 and thyroid antibodies, read together with your symptoms. Thyroid antibodies can be elevated for years before thyroid function changes.
Total T4 and total T3 measure all of each hormone in your blood, while free T4 and free T3 measure the unbound portion your body can use. Reverse T3 is an inactive form of T3. Looking at these together, rather than one number alone, gives a fuller picture of how your thyroid hormones are being made and used.
How Dr. Madeira approaches Hashimoto’s
- A complete thyroid evaluation, including TSH, total and free T4, total and free T3, reverse T3 and thyroid antibodies, and a review of your history and previous results.
- Look for what’s aggravating the immune system, from sleep and gut health to mold toxins and heavy metals.
- Support thyroid function with personalized nutritional and botanical medicine and lifestyle changes.
- Track and adjust with follow-up testing and visits.

