Thyroid evaluation in U.S. clinical practice traditionally starts with thyroid-stimulating hormone (TSH) — the most sensitive marker of thyroid status in adults with intact hypothalamic-pituitary-thyroid axis function. Free T4, free T3, reverse T3,…
In the full monograph
- What it is, and how it works
- What the evidence shows — randomized trials, observational data, animal studies, graded and cited
- Dose, form, and timing
- What to expect, and how soon
- Who should be careful, and what to check first
- The verdict
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