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G1 Peptides

COMPARISON TOOL

Epithalon vs NAD+ vs GHK-Cu vs Thymosin Alpha-1

The healthy-aging shelf: a telomerase-studied tetrapeptide, a cellular coenzyme, the copper peptide, and an immune modulator.

EpithalonNAD+GHK-CuThymosin Alpha-1
Max 4 peptides
PropertyEpithalonNAD+GHK-CuThymosin Alpha-1
CategoryAnti-AgingMetabolicCosmeticImmune
TypePeptideCoenzymePeptidePeptide
MechanismPineal tetrapeptide; studied for telomerase activationNicotinamide adenine dinucleotide repletionCopper-binding tripeptide; collagen, elastin, and gene-expression signallingThymic peptide; T-cell and dendritic-cell modulation
StatusCompounded (Rx)Compounded (Rx)Compounded (Rx)Approved outside US
Dosing range5–10 mg daily (10–20 day cycles)50–500 mg per dose1–2 mg per dose1.5–3.2 mg per dose
FrequencyDaily during cycles; 1–2 cycles yearly1–3× weekly (titrated)Daily or several times weeklyTwice weekly
Half-lifeShort (limited data)Limited human dataShort (limited data)~2 hours
RouteSubcutaneousSubcutaneous (IV in clinic)Subcutaneous or topicalSubcutaneous
OnsetWeeks (cycle-based)Days to weeks4–12 weeks2–4 weeks
Studied for
  • Healthy aging
  • Sleep & circadian rhythm
  • Cellular energy
  • Recovery
  • Healthy aging
  • Skin & collagen
  • Wound healing
  • Hair support
  • Immune modulation
  • Vaccine response
  • Infection recovery
Key risks
  • Injection-site reactions
  • Limited Western trial data
  • Flushing
  • Nausea
  • Injection-site discomfort
  • Stinging on injection
  • Transient fatigue
  • Injection-site reactions
  • Mild fatigue
StorageRefrigerated (2–8 °C); use within the pharmacy beyond-use dateRefrigerated (2–8 °C); use within the pharmacy beyond-use dateRefrigerated (2–8 °C); use within the pharmacy beyond-use date; blue tint is normalRefrigerated (2–8 °C); use within the pharmacy beyond-use date
Available at G1Vials: 10 mg, 50 mgShop →Vials: 500 mg, 1,000 mgPens: X-23Shop →Vials: 50 mg, 100 mgPens: GLOW, KLOWShop →Vials: 10 mg, 20 mgShop →
ToolsDosage calculator →Dosage calculator →Dosage calculator →Dosage calculator →

PROPERTY COMPARISON · RADAR

Profile shape

DurationQuick OnsetVersatilityTolerabilityUse CasesStackability
Editorial profile scores (0–10) for orientation — not clinical measurements.

TYPICAL DOSE RANGES

Dose envelope

Epithalon5 mg – 10 mg
NAD+50 mg – 500 mg
GHK-Cu1 mg – 2 mg
Thymosin Alpha-11.5 mg – 3.2 mg

Typical per-dose range on a logarithmic scale. Your provider sets your dose.

For educational purposes only. Consult a licensed provider before starting any peptide protocol.