Source comparison
Sermorelin vs Tesamorelin: Full Comparison
The following table compares sermorelin and tesamorelin across key research parameters. Review this before selecting a peptide for your protocol. Amino Acid Length 29 amino acids 44 amino acids (with Trans-3-Hexenoic acid modification) Tesamorelin's modificati
This comparison does not assign a generated winner or score.
- The following table compares sermorelin and tesamorelin across key research parameters. Review this before selecting a peptide for your protocol.
- Amino Acid Length
- 29 amino acids
- 44 amino acids (with Trans-3-Hexenoic acid modification)
- Tesamorelin's modification extends half-life and receptor affinity. Critical for sustained effect
- Half-Life
- ~7 minutes
- ~26 minutes
- Longer half-life means tesamorelin maintains GH elevation between pulses; sermorelin clears quickly
- Primary Mechanism
- Mimics endogenous GHRH; restores pulsatile GH secretion
- Enhanced receptor binding; sustained GH elevation targeting visceral fat
- Sermorelin preserves feedback regulation; tesamorelin overrides it for therapeutic effect
- FDA Approval Status
- Not FDA-approved (research-grade only)
- FDA-approved for HIV-associated visceral adiposity (2010)
- Tesamorelin has regulatory backing for one specific indication; sermorelin does not
- Visceral Fat Reduction
- Indirect effect through metabolic improvement
- 15–20% VAT reduction in 26 weeks (COSMIC trials)
- Tesamorelin is purpose-built for visceral fat loss; sermorelin is not
- Dosing Frequency
- Daily subcutaneous (typically 0.2–0.3mg before bed)
- Daily subcutaneous (2mg standard research dose)
- Both require daily administration; tesamorelin dose is fixed and higher
- Cost (Research-Grade)
- $120–180 per 5mg vial
- $240–350 per 2mg vial
- Tesamorelin costs 2–3× more per dose due to synthesis complexity
- Bottom Line
- Best for broad metabolic research and natural GH restoration studies
- Best for targeted visceral fat reduction research with published clinical validation
- Choose based on research endpoint. Sermorelin for physiology, tesamorelin for fat loss