Quick answer: Advanced thyroid and hormone testing goes beyond a single TSH number. A complete workup usually includes TSH, free T4, free T3, reverse T3, and thyroid antibodies (TPO and thyroglobulin), plus stress hormone (cortisol) and sex hormone testing when symptoms point that way. At Dr. Harrison’s Center of Functional Medicine in Westminster, serving Denver and the north metro, these labs are reviewed together to understand why symptoms are happening, not just whether one number is in range.
Why is a basic thyroid test sometimes not enough?
Many people are screened for thyroid problems with a TSH test alone. TSH is a useful starting point, but it is a signal from the brain to the thyroid, not a direct measure of the thyroid hormones your body is actually using. It is possible to have a TSH in the normal range and still have questions left unanswered, especially if you have fatigue, weight changes, feeling cold, hair thinning, or brain fog.
If you have been told “your labs are normal” but still do not feel like yourself, you are not alone. We wrote about that experience in why you can still be exhausted when your labs come back normal.
What should a complete thyroid panel include?
- TSH (thyroid stimulating hormone): the signal from the pituitary gland telling the thyroid to work.
- Free T4: the main hormone the thyroid produces, in the form available to your body.
- Free T3: the active thyroid hormone. The body converts T4 into T3, largely outside the thyroid.
- Reverse T3: an inactive form. Looking at it alongside free T3 can add context about how thyroid hormone is being converted.
- TPO antibodies and thyroglobulin antibodies: markers of an immune response against the thyroid. They are commonly elevated in Hashimoto’s thyroiditis, the most common cause of hypothyroidism in the United States.
For a deeper look at Hashimoto’s specifically, including selenium, vitamin D, and gluten, read our Hashimoto’s testing guide. You can also learn more on our thyroid health page.
What hormone tests are often run alongside thyroid labs?
The thyroid does not work in isolation. Stress hormones, sex hormones, and blood sugar all interact with thyroid function, so a thorough workup often looks at them together:
- Cortisol: the main stress hormone. Some tests measure it at several points across the day to see the rhythm, not just a single value.
- DHEA: another adrenal hormone often reviewed with cortisol. Learn more on our adrenal health page.
- Estrogen, progesterone, and testosterone: sex hormones that affect energy, mood, sleep, and metabolism in both women and men. See our hormone health page.
- Blood sugar markers: such as fasting glucose, insulin, and hemoglobin A1c. Blood sugar problems can produce symptoms that overlap with thyroid and hormone issues. See our diabetes and prediabetes support page.
- Nutrients: such as iron studies, vitamin D, and B12, which can also affect energy and thyroid-related symptoms.
Not everyone needs every test. The right panel depends on your symptoms, history, and any labs you already have. For more on hormone patterns, see our guides on hormone imbalance symptoms you shouldn’t ignore and stress-related hormonal issues.
What does “root-cause analysis” mean for thyroid and hormones?
In functional medicine, root-cause analysis means asking why a lab value or symptom is off, not just noting that it is. For example, if thyroid antibodies are elevated, the next question is what may be driving that immune response. If free T3 is low, the question is what may be affecting conversion from T4. Gut health, stress, blood sugar, and nutrient status are common parts of that conversation.
At our clinic, Dr. Glenn Harrison, DC, reviews these results together to build a personalized Clinical Master Plan. Care focuses on nutrition, lifestyle, and targeted support, and it works alongside your existing medical providers. If you already see an endocrinologist, you can keep doing so. Our article on functional medicine vs. an endocrinologist for thyroid disease explains how the two approaches differ.
Because digestion affects nutrient absorption and immune activity, gut testing is sometimes part of a thyroid workup too. See our guide to comprehensive stool testing, or read how the full process works at our Westminster functional medicine clinic.
When to see your medical doctor instead
Some thyroid and hormone situations need prompt medical care. Contact your medical doctor if you notice a lump or swelling in your neck, a racing or irregular heartbeat, significant unexplained weight loss, or if you are pregnant or planning pregnancy and have thyroid concerns. Do not stop or change any prescribed thyroid or hormone medication without talking to the doctor who prescribed it. If you have a medical emergency, call 911.
Related thyroid guides
- How to choose a holistic thyroid doctor in Denver: 8 questions to ask before you book
- Thyroid or perimenopause? Why the symptoms overlap and what to test
Frequently asked questions
Can I have normal TSH and still have a thyroid issue?
TSH alone does not show the full picture. Free T4, free T3, reverse T3, and thyroid antibodies can add information that a TSH-only screen does not provide. Whether that information changes anything for you depends on your symptoms and history.
What are TPO antibodies?
TPO (thyroid peroxidase) antibodies are a marker of an immune response against the thyroid. They are commonly elevated in Hashimoto’s thyroiditis.
Do you work with patients outside Westminster?
Yes. We see patients in person from Westminster, Arvada, Broomfield, Thornton, Northglenn, and the Denver metro, and we offer telehealth visits for patients across Colorado and beyond.
Is Dr. Harrison a medical doctor?
No. Dr. Glenn Harrison is a Doctor of Chiropractic (DC) who has focused on functional medicine and chronic health issues for more than 10 years. He works alongside patients’ medical doctors and specialists.
How do I start?
Every new patient starts with a free 15-minute discovery call. Schedule your free discovery call or call 720-449-6217.