Head to head
Pentadeca Arginate against GHK-Cu
Two peptides sold together in recovery stacks with different evidence positions. GHK-Cu has human topical data in skin; pentadeca arginate has no study of its own and inherits an animal literature from BPC-157.
Column A
Pentadeca ArginatePentadeca Arginate (PDA, pentadecapeptide arginate)
The same 15 amino acid sequence as BPC-157 with an arginine salt instead of acetate, created as a compounding workaround; it has no studies of its own and inherits BPC-157's animal-only evidence.
Column B
GHK-CuCopper Tripeptide-1 (GHK-Cu)
A naturally occurring copper-binding tripeptide widely used in skincare and studied for wound healing and skin remodeling.
Side by side, on the facts we can check
| Attribute | Pentadeca Arginate | GHK-Cu |
|---|---|---|
| Category | Healing & Recovery | Healing & Recovery |
| FDA status | Not approved; not an FDA-recognized distinct substance | Not an approved drug; permitted as a cosmetic ingredient |
| Half-life | No human pharmacokinetics for either salt form | Short (topical use) |
| Molecular weight | 1,419.5 Da for the BPC-157 pentadecapeptide it is based on; supplied as the arginate salt, which is heavier | 340.38 Da (free peptide); 402.92 Da (the copper complex, PubChem CID 71587328) |
| Mechanism | Presumed identical to BPC-157: FAK-paxillin, VEGFR2 and nitric-oxide signaling supporting angiogenesis and tissue repair in animal models. | Delivers copper and modulates genes involved in tissue remodeling, stimulating collagen and glycosaminoglycan synthesis and supporting wound repair. |
| Human studies cited | 0 | 0 |
| Legal status, US | Not approved; sold 'for research use only' | Permitted in cosmetics; not an approved drug |
Frequently asked questions
What is the difference between Pentadeca Arginate and GHK-Cu?
Pentadeca Arginate: The same 15 amino acid sequence as BPC-157 with an arginine salt instead of acetate, created as a compounding workaround; it has no studies of its own and inherits BPC-157's animal-only evidence. GHK-Cu: A naturally occurring copper-binding tripeptide widely used in skincare and studied for wound healing and skin remodeling.
Which has stronger research evidence, Pentadeca Arginate or GHK-Cu?
This database does not grade compounds. It counts what was run in people: 0 of the 3 studies cited on the Pentadeca Arginate profile were human work, against 0 of 3 for GHK-Cu. Those counts are of our own citation lists and understate any larger literature, and neither is a recommendation.
Are Pentadeca Arginate and GHK-Cu FDA-approved?
Pentadeca Arginate: Not approved; not an FDA-recognized distinct substance. GHK-Cu: Not an approved drug; permitted as a cosmetic ingredient.
Related posts
Blog articles that cover Pentadeca Arginate or GHK-Cu, newest first.
- Longevity / Sep 8, 2026 / 12 minPeptides for Longevity: What the Evidence Actually Shows in 2026
- Healing & Recovery / Sep 8, 2026 / 9 minPeptides for Joint Pain: BPC-157, TB-500, Lorecivivint, Pentosan and Collagen Peptides, Evidence Tiered
- Healing & Recovery / Sep 8, 2026 / 8 minPeptides for Gut Health: BPC-157, KPV and Larazotide Ranked by Human Evidence
- Research / Sep 8, 2026 / 9 minPeptides for Hair Growth: GHK-Cu, PTD-DBM and the PP405 Phase 2a Results
Reviewed Sep 2026. This page sets two published records side by side. It is educational, it is not medical advice, and it contains no dosing protocols or recommendations for personal use.