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

Get it free
ToolsCompareCartalax vs Gonadorelin

Cartalax vs Gonadorelin

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

Anti-Aging & Longevity
Cartalax
Sexual Health & LibidoAnti-Aging & Longevity
Gonadorelin
Summary
Cartalax is a tetrapeptide bioregulator (Ala-Glu-Asp-Pro) developed by Professor Vladimir Khavinson for cartilage and connective tissue. It is tissue-specific for chondrocytes and cartilaginous structures, supporting cartilage matrix synthesis, slowing degenerative changes, and promoting joint longevity. It is used in the context of osteoarthritis, joint aging, and athletic cartilage preservation.
Gonadorelin is the synthetic form of endogenous GnRH (gonadotropin-releasing hormone). It stimulates the pituitary to release LH and FSH, maintaining testicular function and testosterone production. Widely used alongside TRT to prevent testicular atrophy and preserve fertility.
Half-Life
Short (minutes); gene-regulatory effects are sustained
~2–4 minutes (extremely short); pulsatile dosing required to avoid desensitization
Admin Route
SubQ, Oral
SubQ, Intranasal
Research
Typical Dose
10 mg per day
100 mcg
Frequency
Daily for 10–30 days
Twice daily (every 12 hours)
Key Benefits
  • Supports cartilage matrix synthesis and maintenance
  • May slow progression of osteoarthritic cartilage degradation
  • Reduces chondrocyte apoptosis
  • Promotes joint longevity in aging and high-impact sports
  • Anti-aging effects on connective tissue
  • Complementary to BPC-157 and TB-500 in joint recovery protocols
  • Well tolerated in available human and animal research
  • Maintains testicular size during TRT
  • Preserves fertility and sperm production during testosterone use
  • Stimulates endogenous LH/FSH production
  • Maintains HPG axis function during exogenous hormone use
  • Used for HCG-free TRT protocols
  • Helps restart natural testosterone production (PCT)
Side Effects
  • Generally well tolerated
  • Mild injection site reactions
  • No significant adverse events reported at standard doses
  • Injection site reactions
  • Headache
  • Nausea at initiation
  • Tachycardia (rare)
  • +1 more
Stacks With