Thyroid, Metabolism & Bio Age
Your thyroid controls your aging rate
The thyroid regulates metabolism in every cell. Both hypo and hyperthyroidism accelerate aging — optimal TSH (1.0-2.5) is associated with the longest healthspan.
Thyroid-supporting nutrients
Tap each nutrient critical for thyroid function.
This step is interactive — open the Thier app to try it.
Subclinical hypothyroidism is real, common, and missed
TSH 4-10 with normal T4 = subclinical hypothyroid. ~5-10% of adults; ~20% of women >60. Most labs flag only TSH >5.0 as 'abnormal'. But longitudinal studies show subclinical hypothyroidism with TSH 4-10 carries CV-event risk and slower metabolism. The fix isn't always meds — but it's never 'do nothing'. At minimum: optimise sleep, selenium, stress; recheck antibodies; reassess in 3-6 months.
T4 → T3 conversion happens outside the thyroid
Most labs only test TSH and Free T4 — but Free T3 (the active form) tells the real story. Tap each pathway.
This step is interactive — open the Thier app to try it.
Symptoms vs the lab
Match symptom patterns to the most likely root.
This step is interactive — open the Thier app to try it.
Key Takeaway
Optimal thyroid function is a longevity multiplier. Test TSH, free T3, free T4, and thyroid antibodies annually. Selenium is the most impactful supplement for thyroid health.