Why in-range labs miss it
Most labs only run TSH. Functional ranges are narrower than lab ranges. Free T3 below 3.2, reverse T3 above 15, or TPO antibodies above 9 all signal a thyroid in trouble — even when TSH looks fine.
The 5 root causes behind the epidemic
- Hashimotos — autoimmune attack driven by gut permeability, gluten, EBV
- Conversion failure — low selenium, zinc, iron blocks T4 to T3
- Reverse T3 dominance — chronic stress + inflammation hijacks T3
- Toxin burden — fluoride, bromide, mercury displace iodine
- Adrenal/HPA dysfunction — cortisol blocks T3 receptor sensitivity
What to do before you ask for more Synthroid
Map the full panel. Test the antibodies. Pull the gut, mineral, and toxin data. Most thyroid cases improve dramatically once we treat the root cause — not the symptom.
