Glycyl-L-Histidyl-L-Lysine · GHK Tripeptide
GHK (glycyl-L-histidyl-L-lysine) is the same tripeptide sequence as GHK-Cu but WITHOUT the copper ion. It retains cell signaling and gene expression modulation properties but lacks the copper-dependent collagen cross-linking and metalloenzyme activation that makes GHK-Cu uniquely potent. Without copper, GHK has no oxidation concerns and is compatible with a wider range of peptides including VIP and bioregulators. GHK is less commonly used than GHK-Cu because the copper complex provides additional biological activity, but it serves as a safer mixing option where copper incompatibility is a concern.
Same timing as GHK-Cu. Evening preferred. No fasting required.
Start here. Every protocol below is ordered lowest-first. Begin at the smallest effective dose, hold about a week to assess tolerance, and step up only if needed.
GHK modulates gene expression through direct DNA interaction and transcription factor modulation, upregulating genes involved in tissue repair and downregulating inflammatory genes. Without copper, it cannot activate lysyl oxidase or other copper-dependent enzymes, so collagen cross-linking effects are absent. It retains the ability to influence approximately 4,000 human genes in expression studies, though the magnitude of effect is generally less than GHK-Cu.
Days 1-14: Minimal changes.
Weeks 2-6: Subtle tissue support.
Weeks 6-12: Cumulative gene expression effects.
Each reference below was re-fetched from its PubMed record, and the quoted sentence was confirmed to appear in that abstract and to support the claim it sits under. Follow any of them to read the source.
GHK was reported capable of up- and downregulating at least 4,000 human genes.
It is capable of up- and downregulating at least 4,000 human genes, essentially resetting DNA to a healthier state.
GHK Peptide as a Natural Modulator of Multiple Cellular Pathways in Skin Regeneration.
Evidence scope. Narrative review; not SubQ human evidence.
Claims we could not support
No abstract we checked supports these for this molecule at this route. That is not the same as saying they are false — it marks where the evidence is missing.
Dose/route: 1-2 mg SubQ daily. No checked human abstract administered this regimen.
Copper-free mechanism distinction. The review did not establish every claimed distinction.
Excellent safety/injection irritation. No same-route human abstract established it.
Copper-free alternative
Confirmed. GHK without copper is compatible with VIP, bioregulators, and other copper-sensitive peptides. Trade-off is reduced biological potency.
Two different questions: what is documented about running these together, and what is documented about drawing them into the same syringe. A good pharmacological partner can still have to be pinned separately.
Check any specific pair in the Stack & Interaction Checker, which answers both questions separately. Absence of a documented conflict is not evidence of safety.
SubQ
Gene expression changes persist beyond peptide clearance
Enzymatic degradation (rapid peptidase cleavage)
Storage. Standard BAC water 2-8C. Stable for 28 days. No copper oxidation concerns.
Available as research peptide. Not FDA-approved. No WADA prohibition.
Put it to work
Open GHK straight into OnePin with your vial and dose pre-filled, then let it handle the syringe math and remind you before the vial runs out.
Open GHK in the app →Go deeper
The complete GHK walkthrough, real protocol discussion and coaching live inside the BlessUp community on Skool.
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