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

Get it free
ToolsCompareThymagen vs Tesamorelin

Thymagen vs Tesamorelin

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

Immune Support
Thymagen
Growth Hormone PeptidesFat Loss & Metabolic
Tesamorelin
Summary
Thymagen is a dipeptide bioregulator (Glu-Asp) developed by Professor Vladimir Khavinson, tissue-specific for the thymus gland. It supports T-lymphocyte maturation, thymic function, and immune system normalization. As the thymus involutes with age (thymic atrophy), immune competence declines. Thymagen is used to support immune restoration, particularly in aging, post-illness recovery, and immunodeficiency states.
Tesamorelin is an FDA-approved synthetic GHRH analog specifically indicated for reduction of excess abdominal (visceral) fat in HIV patients with lipodystrophy. It is the only GHRH peptide with FDA approval for a fat-reduction indication and is studied off-label for metabolic syndrome and cognitive function.
Half-Life
Short (minutes); sustained gene-regulatory effects
~26 minutes
Admin Route
SubQ, Oral
SubQ
Research
Typical Dose
10 mg per day
2 mg
Frequency
Daily for 10–30 days
Once daily
Key Benefits
  • Supports thymic epithelial cell function and T-cell maturation
  • May partially restore thymic output reduced by age-related atrophy
  • Normalizes T-lymphocyte subpopulation balance
  • Supports immune recovery after illness, surgery, or chemotherapy
  • Anti-aging effects on thymic tissue
  • Complementary to Thymosin Alpha-1 and Thymalin in immune protocols
  • May improve vaccine responsiveness in older individuals
  • FDA-approved for visceral fat reduction in HIV lipodystrophy
  • Significant reduction in trunk/visceral fat (average 15–20% in trials)
  • Improved triglyceride and lipid profiles
  • Potential cognitive benefits and memory improvement
  • Preserves lean mass while reducing fat
  • Natural pulsatile GH stimulation
Side Effects
  • Generally well tolerated
  • Mild injection site reactions
  • No significant immunological adverse events reported
  • Injection site reactions (redness, irritation)
  • Arthralgia and joint pain
  • Peripheral edema
  • Carpal tunnel syndrome
  • +2 more
Stacks With