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

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ToolsCompareTriptorelin vs Follistatin 344

Triptorelin vs Follistatin 344

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

Sexual Health & Libido
Triptorelin
Anabolic & IGF
Follistatin 344
Summary
Triptorelin is a synthetic decapeptide analog of gonadotropin-releasing hormone (GnRH) with 100x the potency of native GnRH. An FDA-approved drug (Trelstar) for prostate cancer and precocious puberty, it is also used in post-cycle therapy (PCT) to rapidly restart the hypothalamic-pituitary-gonadal (HPG) axis after anabolic steroid suppression.
Follistatin 344 is a recombinant form of the endogenous follistatin protein. It inhibits myostatin and activin — the primary negative regulators of muscle growth — potentially removing the genetic ceiling on muscle development. It is one of the most theoretically powerful anabolic compounds but is experimental with limited human data.
Half-Life
Depot forms: weeks to months; aqueous: 6-8 hours
~24–36 hours
Admin Route
SubQ, IM
SubQ, IM
Research
Typical Dose
100 mcg
100 mcg
Frequency
Single injection
Once daily
Key Benefits
  • Rapid HPG axis restart after steroid use
  • Single-injection PCT protocol possible
  • Massively elevates LH and FSH via flare effect
  • Restores endogenous testosterone faster than traditional PCT
  • FDA-approved for established medical uses
  • Inhibits myostatin — removes muscle growth ceiling
  • Significant increases in muscle mass and strength
  • Reduces fat mass
  • Promotes bone density
  • May stimulate hair follicle cycling
  • Anti-fibrotic effects in muscle tissue
  • Synergistic with IGF-1 and other anabolic peptides
Side Effects
  • Initial testosterone flare (intended)
  • Injection site reactions
  • Hot flashes (with chronic use)
  • Decreased libido (chronic dosing)
  • Muscle soreness (from rapid hypertrophy)
  • Potential reproductive effects (activin inhibition)
  • Unknown long-term safety profile
  • Possible esophageal effects at high doses (animal data)
Stacks With