Description
Levothyroxine Sodium (T4) 0,05 mg Astera Labs — levothyroxine (T4) from Astera Labs at 0.05 mg. Storage-form thyroid hormone; body converts to active T3 on demand. Clinical hypothyroid replacement — gentler metabolic shift than T3.
Key Benefits
- Synthetic T4 — standard-of-care thyroid hormone replacement
- Longer-acting than T3; stable serum levels once daily
- Used clinically for hypothyroidism
- Off-label use for metabolic rate support in cutting
- Less aggressive than T3 but also lower cutting utility
- Each unit dosed at 05 mg — see Recommended Dosage below for protocol-specific intake
How It Works
Synthetic L-thyroxine (T4). Liver deiodinates T4 to active T3 peripherally. Unlike direct T3 use, T4 allows the body to regulate conversion rate — gentler metabolic profile, less cardiovascular stress.
Pharmacokinetics
Plasma half-life approximately 7 days. Once-daily dosing on empty stomach (absorption reduced by calcium, iron, food). Steady-state at 4–6 weeks.
Potential Side Effects
Over-replacement: tachycardia, insomnia, anxiety, weight loss beyond target. Under-replacement: fatigue, weight gain, cold intolerance. Monitor TSH + free T4 at week 6.
Cycle & Stacking Guide
Long-term replacement use in hypothyroid patients. For performance use: T3 is preferred; T4 makes sense only as a stable background layer in extended protocols. Bloodwork every 3 months.
Manufacturer Notes
Astera Labs produces a broad catalogue from research peptides to AAS oils. Lyophilised peptide vials ship with stability documentation.
Storage & Handling
Store at recommended temperature (15–25°C; peptides and HGH at 2–8°C after reconstitution). Protect from light and moisture. Keep out of reach of children. For research and educational purposes only.
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