Ingredient or product comparison
GHK-Cu 60s Age Specific Protocol: Administration Method Comparison
Subcutaneous (abdominal) 60–75% 45–90 minutes 8–12 hours Once daily Highest consistency in absorption and plasma levels; preferred for structured protocols requiring reproducible dosing Transdermal (DMSO carrier) 40–50% 2–3 hours 10–14 hours Lower bioavailabil
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- Subcutaneous (abdominal)
- 60–75%
- 45–90 minutes
- 8–12 hours
- Once daily
- Highest consistency in absorption and plasma levels; preferred for structured protocols requiring reproducible dosing
- Transdermal (DMSO carrier)
- 40–50%
- 2–3 hours
- 10–14 hours
- Lower bioavailability offset by extended absorption curve; suitable for injection-averse individuals but requires precise carrier formulation
- Transdermal (liposomal)
- 35–45%
- 3–4 hours
- 12–16 hours
- Slowest onset but longest tissue retention; compliance advantage for those unable to tolerate injections or DMSO
- Oral (capsule)
- <5%
- N/A
- Not recommended
- Peptide bonds degraded by gastric enzymes before absorption; clinically ineffective for GHK-Cu