CJC-1295 vs Syn-Coll
Side-by-side comparison of key properties, dosing, and research.
- Summary
- CJC-1295 is a synthetic GHRH analog that stimulates the pituitary gland to produce and release growth hormone. The DAC (Drug Affinity Complex) version has a markedly extended half-life. The No DAC version (Modified GRF 1-29) preserves natural pulsatile GH release and is preferred in most protocols.
- Syn-Coll is a palmitoylated tripeptide (Palmitoyl Tripeptide-5) that mimics thrombospondin-1 to activate TGF-beta, the primary growth factor driving collagen synthesis in the dermis. It is one of the most mechanistically direct collagen-stimulating peptides in cosmetic formulations.
- Half-Life
- ~30 minutes (No DAC) / 6–8 days (with DAC)
- Extended (lipid depot in stratum corneum)
- Admin Route
- SubQ
- Topical
- Research
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- Typical Dose
- 100 mcg
- 0.005-0.05% in formulation
- Frequency
- Once daily, before bed
- Once or twice daily
- Key Benefits
- Sustained increase in growth hormone levels
- Enhanced muscle growth and strength
- Improved fat metabolism and body composition
- Better recovery and tissue repair
- Increased bone density
- Enhanced immune function
- Improved skin quality and collagen production
- Synergistic GH release when combined with GHRPs like Ipamorelin
- Directly activates TGF-beta for potent collagen synthesis stimulation
- Increases dermal thickness and firmness
- Reduces depth of wrinkles and fine lines
- Improves skin elasticity
- Clinically validated in collagen induction studies
- Complementary to retinoids or vitamin C
- Side Effects
- Water retention / puffiness
- Carpal tunnel syndrome (with prolonged use)
- Injection site irritation
- Hunger increase (minor)
- +1 more
- Generally well-tolerated
- Rare mild irritation at high concentrations
- Possible sensitivity in individuals with inflammatory skin conditions
- Stacks With
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