What Is T3 (Liothyronine)?
T3, or Liothyronine, is a synthetic form of the thyroid hormone triiodothyronine. It is often prescribed for the treatment of hypothyroidism (an underactive thyroid). T3 plays a critical role in regulating the metabolism, and as a result, it influences energy production, fat burning, and overall body functions.
T3-50mcg is a relatively common dosage used both for medical treatment and in weight loss or fat-burning cycles, especially by those who are seeking faster metabolic rates.
💊 Dosage & Usage Guidelines
| Goal | Dosage (Typical) | Timing & Notes |
|---|---|---|
| Hypothyroidism Treatment | 25–50mcg (adjust as needed) | Usually prescribed by a doctor for thyroid conditions |
| Fat Loss (Fat Burning Cycle) | 25–75mcg (build up) | Start low and gradually increase, max of 100mcg per day |
| Bodybuilders/Cutting | 25–50mcg (short-term use) | Common in fat loss cycles, typically for 4–6 weeks |
📆 Half-Life: ~1–2 days
🕒 Duration of Effect: 1–2 hours per dose
💊 Frequency: Once daily, usually in the morning for optimal metabolic effect.




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