They are not FDA-approved (compounded medications are regulated differently), but they meet rigorous quality and potency requirements
*Please note: The half-life of T4/T3 combination medications may vary per formulation (this can vary depending on the formulation and whether it is an immediate or sustained release version), so some people may have a falsely suppressed TSH, even at the euthyroid state (or the state of normal thyroid function), when taking T3-containing medications
Some protocols suggest localized administration for specific injury sites
But Dan and I know underneath that there often lies a parasitic infection, a small intestinal bacterial overgrowth, a fungal overgrowth, or any number of things that are very treatable from a functional perspective
When prepared by a licensed 503B compounding pharmacy and administered at the correct therapeutic doses, clinical outcomes are equivalent