T3 25 - Pharmaceutical Grade

Introduced as Cytomel® in the 1950s, liothyronine sodium replaced inconsistent natural thyroid extracts with a stable, synthetic T3 hormone. Unlike levothyroxine (T4), liothyronine acts directly without needing peripheral conversion, resulting in rapid metabolic activation. Although associated with muscle loss in uncontrolled use, it is still valued for contest prep. Cytomel’s effectiveness lies in its high potency, rapid action, and predictable pharmacokinetics in clinical and performance contexts.

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For detailed information about T3 25 by Pharmaceutical Grade, consult with your doctor or healthcare professional.