Understand the source comparison
Glow Stack Skin Aging Mechanism: Peptides Comparison
Before committing to a peptide stack, understanding which compounds deliver measurable results versus marketing noise matters. Not every peptide marketed for anti-aging addresses a rate-limiting biological pathway. GHK-Cu Stimulates collagen I/III gene express
No winner is assigned.
This page preserves a source comparison for education. It does not add a rating, recommendation or clinical judgment.
- Before committing to a peptide stack, understanding which compounds deliver measurable results versus marketing noise matters. Not every peptide marketed for anti-aging addresses a rate-limiting biological pathway.
- GHK-Cu
- Stimulates collagen I/III gene expression via TGF-β activation
- Collagen synthesis, fibroblast activation
- 1–3 mM topical
- High. Multiple RCTs showing 60–70% increases in procollagen synthesis
- Essential collagen driver. Copper ion critical, unstable in basic pH
- Epitalon (AEDG)
- Activates telomerase (hTERT), clears senescent cells
- Cellular senescence, telomere maintenance
- 10–50 μM topical or 1–3 mg subcutaneous
- Moderate. Russian gerontology studies, limited Western RCT data
- Strongest senescence-clearing peptide available, dosing still under-researched
- MOTS-c
- Activates AMPK, improves mitochondrial oxidative phosphorylation
- Mitochondrial function, ATP production
- 5–20 μM topical
- Emerging. Preclinical strong, human dermal trials ongoing
- Restores energy substrate for collagen synthesis, pairs with GHK-Cu
- Matrixyl (palmitoyl pentapeptide-4)
- Stimulates collagen synthesis through less-defined pathways
- Collagen synthesis
- 3–5% formulation
- Moderate. Company-funded studies, some independent replication
- Weaker collagen stimulator than GHK-Cu, but more stable in formulations
- Argireline (acetyl hexapeptide-8)
- Inhibits SNARE complex formation, reduces muscle contraction
- Expression line reduction (topical botox-like effect)
- 5–10% formulation
- Low. Mechanism sound, clinical significance debated
- Addresses symptoms (lines) not causes (collagen loss), adjunct only
- Glutathione precursors (NAC, glycine)
- Support synthesis of reduced L-glutathione (GSH), primary cellular antioxidant
- Oxidative stress defence, redox homeostasis
- 600–1200 mg oral NAC or 2–5% topical
- High. Extensive antioxidant literature, dermal penetration varies by formulation
- Essential baseline support, prevents damage accumulation, pairs with all other peptides