Description
L-Thyroxin 50 50 mkg Berlin Chemie — This Berlin Chemie formulation delivers this thermogenic or metabolic compound accelerates fat oxidation and supports lean body composition during cutting phases. It enhances basal metabolic rate, promotes lipolysis, and helps athletes achieve a defined physique while preserving muscle mass.
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
Recommended Dosage
Clinical dosing: 50–150 mcg/day titrated to TSH/free T4. Weight-loss protocols typically 100 mcg/day but T3 is preferred for cutting due to stronger metabolic effect.
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.
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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