Behind the scenes: How I think through thyroid labs 👩‍⚕️


A 50-year-old female came in with: fatigue, weight gain, constipation, and bloating.


She’s on Synthroid, but still struggling.


👉 Her labs told a deeper story:

  • TSH 8.28 (↑): thyroid still underactive, even on meds.
  • Free T4 and Free T3 were low-normal. In this case, we caught Free T3 at its peak because medication was taken before the blood draw. Thyroid medication levels naturally rise and fall throughout the day (peaks and troughs). Typically, I prefer to test at the trough—right before the next dose. This lab was drawn under different circumstances.
  • TPO antibodies high: Hashimoto’s confirmed.
  • Low Vit D, iron, B12: nutrient roadblocks.
  • Elevated insulin + cholesterol: thyroid + metabolism connection.


👉 My read:

This isn’t “just hypothyroidism.” It’s an autoimmune process + conversion problem + nutrient gaps + metabolic stress.


⚡ The deeper layer:

Hashimoto’s isn’t only about thyroid hormones.

  • Nutrients drive hormone conversion and energy metabolism.
  • The liver converts T4 → T3.
  • Gut + immune balance regulate inflammation, which can elevate or suppress TSH.
  • The mitochondria impacts cellular energy availability and Free T3 effectiveness.
  • Chronic stress & high cortisol suppresses thyroid function (at the level of the brain).


💡 Plan:

  • NAC + selenium/inositol for liver, thyroid + immune support
  • Iron, B12, Vit D to replenish nutrient reserves
  • Anti-inflammatory, gut-friendly nutrition to support a healthy & diverse microbiome
  • No-snacking + post-meal walks to improve insulin sensitivity
  • Nervous system care to regulate the stress response system & increase resilience


👩‍⚕️ Thyroid care isn’t about chasing perfect lab numbers


It’s about rebuilding the foundation — gut, nutrients, metabolism, immune health — so your body can actually use those hormones effectively.


👉 That’s the ND difference: connecting dots your labs alone can’t.


This is how naturopathic medicine works: We connect the dots between thyroid, gut, immune, and metabolic health. We don’t just swap meds—we rebuild the foundation.