Thyroid
Men Women (soon)
Thyroid-stimulating hormone — the pituitary signal that drives thyroid hormone production. First-line thyroid screen.
Optimal range
Range varies by individual.
Why this biomarker matters
Optimal TSH for energy and metabolic function is 0.5–2.5 mIU/L. Both subclinical hypo- and hyperthyroidism reduce performance and elevate cardiovascular risk over decades.
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