Armour Thyroid
About
About Armour Thyroid
Armour Thyroid is a desiccated thyroid extract (DTE) derived from porcine thyroid glands, containing both T4 and T3 in a naturally occurring ratio of approximately 4:1. It is FDA-approved for hypothyroidism and preferred by some patients and practitioners for its dual-hormone content and natural origin. Studies suggest some patients achieve better symptom control on DTE compared to T4 monotherapy, particularly those with impaired T4-to-T3 conversion.
Science
Mechanism of Action
Provides both thyroxine (T4) and triiodothyronine (T3) along with T1, T2, and calcitonin in physiologic ratios derived from porcine thyroid tissue; the immediate T3 content bypasses conversion variability and directly activates thyroid hormone receptors.
Dosing
Typical Protocol
15–180 mg (1/4 to 3 grains) oral once daily; 60 mg Armour is roughly equivalent to 100 mcg levothyroxine.
⚠ Protocol information is for educational purposes only. Dosing must be determined by a licensed physician based on individual health status and goals.
Regulatory
Legal Status in 2026
This compound has completed clinical trials and received formal FDA approval for one or more indications. It can be legally prescribed by licensed physicians, filled at any licensed pharmacy, and may be covered by insurance. Off-label use by physicians is also legal. This is the highest level of regulatory clearance available in the US.
Evidence
Evidence Tier
Supported by the clinical trial data required for FDA approval, representing the highest evidence bar. Safety and efficacy have been established in multiple phases of human clinical trials.
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