New — Free Peptide Starter Guide (2026): 13 chapters, 34 cited studies

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ToolsCompareThymulin vs Dermorphin

Thymulin vs Dermorphin

Side-by-side comparison of key properties, dosing, and research.

Immune Support
Thymulin
Recovery & Repair
Dermorphin
Summary
Thymulin is a nonapeptide hormone produced exclusively by the thymic epithelium. It requires zinc for biological activity and plays a critical role in T-lymphocyte maturation, differentiation, and immune regulation. Thymulin levels decline dramatically with age, contributing to immunosenescence.
Dermorphin is a naturally occurring heptapeptide opioid isolated from the skin of South American phyllomedusine frogs. It is one of the most potent endogenous mu-opioid receptor agonists known, approximately 30-40 times more potent than morphine by weight. Explored for pain management and fatigue modulation.
Half-Life
~30 minutes active half-life
Estimated 30-60 minutes (longer than endorphins due to D-Ala)
Admin Route
SubQ
Subcutaneous (research), Intrathecal (research), Intranasal (research)
Research
Typical Dose
20-30 mcg
Not established for human use; research doses vary widely
Frequency
10 days per month (Khavinson protocol)
Not established
Key Benefits
  • Enhances T-cell maturation and differentiation
  • Boosts NK cell cytotoxic activity
  • Reduces inflammatory cytokine production (TNF-α, IL-1)
  • Anti-nociceptive (pain-reducing) properties
  • Restores age-related immune decline
  • Anti-inflammatory via serotonin pathway modulation
  • Potent analgesia superior to morphine on a per-weight basis
  • May reduce perception of fatigue in high-intensity activity
  • Longer-lasting than endogenous opioids due to D-amino acid substitution
  • Research tool for mu-opioid receptor pharmacology
  • Potential therapeutic application in refractory pain
Side Effects
  • Injection site reactions
  • Mild fatigue initially as immune system activates
  • High addiction and dependence potential (mu-opioid agonism)
  • Respiratory depression at high doses
  • Nausea, vomiting, constipation
  • Sedation and cognitive impairment
  • +2 more
Stacks With