119: Why Hashimoto’s Symptoms Persist: The Root Causes You May Be Missing – Dr. Miles Nichols

In this episode of the Thyroid Pharmacist Healing Conversations podcast, Dr. Izabella Wentz interviews Dr. Miles Nichols, DAOM, MSOM, LAc, founder of Medicine With Heart Clinic and the Medicine With Heart Institute. Dr. Miles shares his personal Hashimoto’s healing journey, including his experience with debilitating fatigue and brain fog despite being told that his initial testing looked “normal.” His search for answers ultimately led him to look beyond conventional thyroid markers and uncover several potential root causes contributing to his symptoms.

Dr. Miles and Dr. Wentz explore why Hashimoto’s can be more complex than a single thyroid diagnosis and how factors involving the gut, immune system, infections, environmental exposures, and nutrient status may fit into the bigger picture. He also shares how he approaches complex cases in his practice, the types of testing that can uncover less obvious contributors, and some of the emerging therapies he believes could shape the future of personalized care.

What You'll Learn in This Episode:

The overlooked connection between the gut and the thyroid: Dr. Miles shares a surprising discovery from his own health journey involving parietal cell antibodies and H. pylori. He explains how gut-related issues may affect thyroid and immune health, even when someone has no obvious digestive symptoms.

What to investigate when the basics have already been addressed: What happens when someone has improved their diet, supported their gut health, prioritized sleep, and worked on stress, and has “normal” thyroid labs, but still doesn’t feel well? Dr. Miles explains what he investigates when a person has done the “right” things but continues to struggle with symptoms.

The less obvious contributors to Hashimoto’s symptoms: Dr. Miles discusses the testing that can help uncover hidden factors, including nutrient deficiencies, immune markers, infections, and environmental exposures. He explains why examining these pieces together can provide more useful information than focusing on a single lab value.

How environmental exposures may affect thyroid and immune health: Mold, chemicals, microplastics, and other environmental exposures may place additional stress on the body. Dr. Miles explains why identifying and, when possible, addressing the source of an exposure can be an important part of supporting recovery.

What the future of thyroid care could look like: From peptides and nervous system therapies to emerging approach