Sermorelin vs TB-500
Well Studied vs Well Studied
synergistic Mechanism-based · 47% Sermorelin and TB-500 work through complementary pathways. Growth hormone signaling supports tissue repair processes. A well-established combination in recovery protocols.
Molecular Data
Sermorelin TB-500
Weight 3,358 Da 4,963.44 Da
Half-life 10-12 minutes ~2 hours
Chain 29 amino acids 43 amino acids
Type GHRH analog Thymosin fragment
Key Benefits
Sermorelin
01 FDA-proven efficacy
02 Maintains natural GH pulsatile patterns
03 Preserves pituitary function
04 1.26kg lean mass increase documented in elderly
05 IGF-1 mediated anabolic effects
06 Allows natural feedback regulation
TB-500
01 Superior systemic tissue repair
02 Accelerated muscle, tendon, and ligament healing
03 Enhanced cell migration and angiogenesis
04 Comprehensive regenerative effects
05 Neuroprotective properties
Dosing Protocols
Sermorelin
200-300mcg per dose (up to 500mcg for athletic performance) / Once daily at bedtime (aligns with natural GH pulse)
Anti-aging/Longevity 200-300mcg Once at bedtime
Athletic Performance 300-500mcg Once at bedtime
Body Composition 200mcg 5 days weekly
Combination Therapy 200mcg + GHRP Once daily
TB-500
2-5mg per injection (higher doses for serious injuries) / 2-3x weekly (e.g., Monday, Wednesday, Friday)
General tissue repair 2-3mg 2x weekly
Serious injury recovery 4-5mg 3x weekly
Athletic enhancement 2-3mg 2x weekly
Chronic conditions 3-4mg 2-3x weekly
Maintenance 2mg 1-2x weekly
Post-surgical recovery 3-5mg 3x weekly
Side Effects
Sermorelin
Injection site reactions (16.7% of patients - generally mild)
Nasal irritation (intranasal route)
TB-500
Generally minimal side effects
Possible mild injection site reactions
Temporary fatigue in some users
Contraindications
Active malignancy
Pituitary tumors
Pregnancy
Active cancer treatment (due to angiogenic effects)
Pregnancy or breastfeeding
Immunosuppressive medications (consult provider)
WADA prohibited for competitive athletes
Research Evidence
Sermorelin TB-500
Status Well Studied Well Studied
References 5 studies 6 studies
Latest November 2024 November 2025
FDA Approved No No
This comparison is for educational and research purposes only. Consult a healthcare professional before use.