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

Get it free
ToolsCompareThymalin vs BPC-157

Thymalin vs BPC-157

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

Immune SupportAnti-Aging & Longevity
Thymalin
Recovery & Repair
BPC-157
Summary
Thymalin is a polypeptide complex isolated from calf thymus glands (developed by the Russian Gerontology Institute), shown to restore immune function, extend lifespan, and reverse thymic involution. Clinical studies demonstrate improved immune parameters and up to 40% reduction in mortality in elderly patients.
BPC-157 is a synthetic pentadecapeptide derived from a protective protein found in the stomach. It is one of the most extensively researched healing peptides, known for accelerating tissue repair, reducing inflammation, and protecting the gastrointestinal tract.
Half-Life
Not well characterized as a complex extract; individual peptides have varying kinetics
4–6 hours
Admin Route
SubQ, IM
SubQ, IM, Oral
Research
Typical Dose
10 mg IM or SC daily
200–500 mcg
Frequency
Once daily
Once daily
Key Benefits
  • Restores thymic function and T-cell immunity
  • Extends healthy lifespan (documented in long-term studies)
  • Reduces infectious disease incidence in elderly
  • Normalizes immune parameters in immunodeficiency
  • Anti-tumor immune surveillance
  • Improves vaccine response in elderly
  • Reduces cardiovascular mortality (40% in landmark Russian study)
  • Normalizes neuroendocrine function
  • Accelerates wound healing and tissue repair
  • Reduces inflammation throughout the body
  • Protects and heals the gastrointestinal tract
  • Supports tendon and ligament healing
  • Promotes bone and joint health
  • May protect organs from toxins and injury
  • Supports gut-brain axis function
  • Counteracts NSAID-induced gut damage
Side Effects
  • Very well tolerated in decades of Russian clinical use
  • Mild injection site reactions
  • Rare: mild allergic reaction (natural extract)
  • Transient flu-like symptoms on initiation (immune activation)
  • Injection site discomfort
  • Nausea (rare)
  • Headache (rare)
  • Dizziness (rare)
Stacks With