GHK-Cu vs Rigin (Palmitoyl Tetrapeptide-7)
Head-to-head comparison of GHK-Cu and Rigin (Palmitoyl Tetrapeptide-7) for research applications. Both peptides are studied for Skin Health, but they differ significantly in mechanism, evidence level, and dosing protocols.
Side-by-Side Comparison
| Attribute | Ghk Cu | Rigin |
|---|---|---|
| Category | Skin & Tissue Repair | Cosmetic |
| Mechanism | GHK-Cu chelates copper(II) ions via its histidine residue and delivers bioavailable copper directly to cells, preventing free copper oxidative damage. | Inhibits IL-6 secretion from UVB-exposed keratinocytes. Modulates complement system activity and dampens chronic inflammatory signaling associated with skin aging. |
| Evidence Rating | F — No Regulatory Activity | D — Limited Evidence |
| Clinical Status | Available in cosmetic formulations; no drug approval | Cosmetic ingredient |
| Safety Profile | Safety profile is excellent with minimal side effects reported in decades of cosmetic use and clinical research (PMID: 29986520); Topical forms are generally well-tolerated; mild skin irritation rare and typically limited to very sensitive skin | Well-tolerated topically |
| Route | Subcutaneous, Topical (cream/serum), or Intradermal (microneedling) | Topical |
| Dose Range | SC: 50–200 mcg/day; Topical: 1–4% cream or serum applied to target area | Serums containing rigin (palmitoyl tetrapeptide-7) as part of Matrixyl 3000 |
| Frequency | SC: Once daily; Topical: 1–2x daily | 1–2 times daily |
Overview
GHK-Cu and Rigin (Palmitoyl Tetrapeptide-7) are both research peptides studied across multiple applications. This comparison examines their mechanisms, evidence base, dosing protocols, and safety profiles to help researchers understand the key differences and overlaps.
GHK-Cu — Mechanism & Evidence
GHK-Cu is a naturally occurring copper-binding tripeptide (glycyl-L-histidyl-L-lysine) found in human plasma, saliva, and urine. First discovered by Dr. Loren Pickart in 1973, plasma levels average 200 ng/mL at age 20 but decline to ~80 ng/mL by age 60. It has been extensively studied for wound healing, collagen synthesis, skin regeneration, and gene modulation, with decades of cosmetic use and a broad safety profile. Molecular weight is approximately 340 g/mol (as the copper complex), with the formula C14H24N6O4Cu.
Key claims: Improves skin firmness and elasticity; Promotes wound healing; Reduces fine lines and wrinkles.
Rigin (Palmitoyl Tetrapeptide-7) — Mechanism & Evidence
Rigin reduces IL-6 secretion by keratinocytes after UVB exposure, helping reduce chronic low-grade inflammation in aging skin (inflammaging). It is a key component of the Matrixyl 3000 complex alongside Palmitoyl Oligopeptide.
Key claims: Anti-inflammatory skin care.
Shared Research Applications
Both peptides are studied for: Skin Health.
GHK-Cu is also researched for: Anti-Aging, Wound Healing.
Rigin (Palmitoyl Tetrapeptide-7) is also researched for: Cosmetic Skincare.
Safety Considerations
GHK-Cu: Safety profile is excellent with minimal side effects reported in decades of cosmetic use and clinical research (PMID: 29986520) Topical forms are generally well-tolerated; mild skin irritation rare and typically limited to very sensitive skin Injectable forms: mild injection site reactions, lightheadedness, nausea, flu-like symptoms possible; rotate injection sites to reduce local irritation
Rigin (Palmitoyl Tetrapeptide-7): Well-tolerated topically
Shop Research Peptides
GHK-Cu 50mg
50mg
BPC-157 5mg
5mg
Retatrutide 20mg
20mg
Retatrutide 10mg
10mg
Tesamorelin 10mg
10mg
BPC-157 10mg
10mg
Tirzepatide 10mg
10mg
KPV 10mg
10mg
Quality Documentation
Review batch documentation before making research purchasing decisions. Volta pairs product education with COA literacy so researchers can evaluate purity, identity, lot details, and testing context.
Product cards on this page link to current catalog entries and available quality documentation.
Related Research News
GHK-Cu in Research: Reconstitution, Stability, and Handling Guide
This guide covers the essentials of working with GHK-Cu in a research setting, from reconstitution math and solvent choice to stability and purity considerations. Learn how to handle copper peptides correctly and what to verify before starting a study.
GHK-Cu and Hair Follicle Growth: A Review of Copper Peptide Dermatological Research
Explore the preclinical evidence on GHK-Cu for hair follicle growth, including proposed mechanisms and research limitations.
Synergistic Regeneration: BPC-157, Thymosin Beta-4, and GHK-Cu in Healing Research
Explore the synergistic potential of BPC-157, Thymosin Beta-4, and GHK-Cu in regenerative research. Preclinical evidence and mechanisms reviewed.
Peptide Tools
Follow Research Updates
Get new research pages, product updates, tool releases, and quality resources from Volta.
Subscribe