● TIER 1 — FDA-approved / recognizedGRADE AThyroid
Thyroid hormone (T4/T3)
Thyroid hormones. Research verification: Yes (TGA pending). 1 human study record(s) in the FitClinicMD studies database.
GOALS · Hormone optimization / menopause / low T
FDA status
Approved (levothyroxine, liothyronine).
Compounding (503A/503B)
Approved.
DEA
Not controlled.
WADA (sport)
Not listed on 2026 Prohibited List (no matching section found)
Mechanism
TR agonists.
Human evidence · 1
TRUST, n=737 adults ≥65 subclinical hypothyroidism: no benefit. Thyroid Hormone Therapy for Older Adults with Subclinical Hypothyroidism.
Reference only. This page summarizes publicly available regulatory and research information about Thyroid hormone (T4/T3). It is not a prescription, an endorsement, or an offer to dispense, and regulatory status can change. Clinicians should verify current status before prescribing or compounding.