Follistatin vs Palmitoyl Dipeptide-6
Side-by-side comparison of key properties, dosing, and research.
Anabolic & IGF
FollistatinSkin & CosmeticAnti-Aging & Longevity
Palmitoyl Dipeptide-6- Summary
- Follistatin is an endogenous glycoprotein that acts as a potent inhibitor of myostatin and activin, two proteins that limit muscle growth. By binding and neutralizing myostatin, follistatin removes the primary brake on skeletal muscle hypertrophy, enabling significant muscle growth beyond normal physiological limits. It is distinct from its isoforms Follistatin 315 and Follistatin 344 in tissue distribution and binding affinity.
- Palmitoyl Dipeptide-6 is a synthetic dipeptide (lysine-threonine) with a palmitoyl fatty acid tail, designed to penetrate the skin barrier and stimulate the extracellular matrix components essential for skin firmness. It activates fibronectin and type IV collagen synthesis, improving skin density and firmness particularly in mature or sagging skin.
- Half-Life
- ~3–5 hours (endogenous form)
- Not applicable (topical)
- Admin Route
- IM, SubQ
- Topical
- Research
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- Typical Dose
- 50–100 mcg per injection site
- 0.005–0.05% in formulation
- Frequency
- Every other day or 2–3x per week
- Once or twice daily
- Key Benefits
- Potent myostatin inhibition enabling supraphysiological muscle growth
- Increases skeletal muscle mass and fiber size
- May accelerate recovery from muscle injury
- Potential benefits in muscular dystrophy and sarcopenia
- Synergistic with IGF-1 and growth hormone in anabolic protocols
- Animal studies show dramatic increases in muscle mass
- Reduces muscle fibrosis in dystrophic models
- Increases skin firmness and density
- Stimulates fibronectin and collagen IV production
- Strengthens the dermal-epidermal junction
- Reduces skin sagging in mature skin
- Improves skin texture and smoothness
- Supports extracellular matrix integrity
- Side Effects
- Potential for excessive muscle growth if doses are not controlled
- FSH suppression with implications for fertility in women
- Theoretical risk of cardiac hypertrophy with prolonged high-dose use
- Limited human safety data available
- +1 more
- Generally well-tolerated
- Rare mild skin irritation in sensitive individuals
- No known systemic effects at cosmetic concentrations
- Stacks With
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