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Peptide Therapy GuideClear peptide education

Understand the source comparison

Glow Stack Results After 1 Week: Comparison of Active Compounds

Different peptides and actives produce different first-week effects. The table below compares what happens during the initial seven days based on compound type. GHK-Cu (Copper Peptide) Activates NF-κB transcription factor, upregulates procollagen I/III gene ex

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  • Different peptides and actives produce different first-week effects. The table below compares what happens during the initial seven days based on compound type.
  • GHK-Cu (Copper Peptide)
  • Activates NF-κB transcription factor, upregulates procollagen I/III gene expression
  • 70% increase in procollagen synthesis (measurable via biopsy or indirect biomarkers)
  • Minimal. Slight improvement in skin resilience on palpation
  • Cellular activation is strong; visible results appear weeks 3–4
  • Matrixyl (Palmitoyl Pentapeptide-4)
  • Mimics collagen breakdown products, triggers fibroblast repair response
  • 117% increase in collagen synthesis, 267% increase in HA production (in vitro)
  • Minimal. Slight plumping effect, no wrinkle depth reduction
  • Works as intended but surface changes require 21+ days of consistent use
  • Low-Molecular-Weight Hyaluronic Acid
  • Penetrates stratum corneum, binds water in dermis
  • 30% increase in dermal hydration (measurable via corneometer)
  • Subtle. Skin feels softer, fine lines may look slightly less pronounced under certain lighting
  • Hydration is real but doesn't translate to dramatic visible improvement in week one
  • Retinol or Retinoid Alternatives
  • Increases keratinocyte turnover, thins stratum corneum, stimulates collagen remodeling
  • Accelerated desquamation, mild peeling in some users
  • Minimal. Possible mild redness or flaking as turnover increases
  • Purging and adjustment period common; visible improvement begins weeks 4–6
  • Niacinamide (Vitamin B3)
  • Increases ceramide synthesis, reduces transepidermal water loss (TEWL)
  • 10–15% reduction in TEWL, improved barrier function
  • Subtle. Slight reduction in dryness or tightness
  • Barrier support is immediate but doesn't produce visible glow in isolation