GHK-Cu Tracker App
Log Topical and Injectable Doses, Track Skin Progress, and Monitor Hair Density
GHK-Cu (Glycine-Histidine-Lysine-Copper) is a naturally occurring tripeptide-copper complex found in human plasma, saliva, and urine, with serum concentrations declining significantly with age. It acts as a potent regulator of collagen and elastin synthesis, antioxidant defence, stem cell recruitment, and tissue remodelling. GHK-Cu is used both as a cosmetic topical ingredient and — in research contexts — as a subcutaneous injectable for systemic regenerative effects. Shotlee tracks every application, skin photo, hair density measurement, and lab marker in one free app.
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What Is GHK-Cu?
GHK-Cu (Glycine-L-Histidine-L-Lysine complexed with copper II) is a tripeptide that occurs naturally in human plasma at concentrations around 200 ng/mL at age 20, declining to approximately 80 ng/mL by age 60 — a reduction closely associated with age-related decline in tissue repair capacity and skin structural integrity. The peptide acts as a carrier for copper ions to sites of tissue damage, coordinating a wide range of repair, remodelling, and antioxidant processes.
GHK-Cu has a dual-use profile that distinguishes it from most research peptides: topical formulations are commercially available as cosmetic skincare ingredients (legal in most markets), while injectable GHK-Cu occupies the same research-only grey area as other experimental peptides. The topical form is used for skin rejuvenation, fine line reduction, and wound healing. The injectable form targets systemic regenerative effects and is studied for hair loss, anti-ageing, and wound repair.
Topical vs Injectable: Different Regulatory Status
Topical GHK-Cu is widely available as a cosmetic skincare ingredient and is legal in most markets. Injectable GHK-Cu is a research peptide not approved for human use in most jurisdictions. Consult a physician before using injectable forms.
Protocol Options
Varies by formulation
Topical cream or serum, once or twice daily
Applied to skin (face, scalp, wound site) daily. Concentrations range from 0.1–5% GHK-Cu in commercial and compounded formulations. No injection required.
1–2 mg
Subcutaneous injection, daily or every other day
Injectable research protocol for systemic regenerative effects, hair follicle stimulation, and wound healing. Typical cycle: 4–8 weeks.
Mechanism of Action
Delivers bioavailable copper ions to sites of tissue damage, where copper acts as a cofactor for lysyl oxidase — the enzyme responsible for cross-linking collagen and elastin fibres into structural skin matrix.
Activates matrix metalloproteinase (MMP) systems that remodel damaged or disorganised extracellular matrix, while simultaneously upregulating TGF-b1 to stimulate new collagen I and collagen III synthesis.
Stimulates stem cell recruitment to wound sites via upregulation of stromal cell-derived factor 1 (SDF-1), attracting progenitor cells that differentiate into tissue-specific repair cells.
Exerts antioxidant and anti-inflammatory effects by upregulating superoxide dismutase (SOD) and reducing TNF-a, protecting newly regenerating tissue from oxidative damage during repair.
Research Highlights
Collagen Synthesis
+70%
In vitro studies show GHK-Cu increases collagen synthesis by up to 70% in fibroblast cultures, with concurrent increases in elastin and fibronectin.
Wound Healing
Faster
Multiple animal wound healing models show accelerated full-thickness wound closure, increased angiogenesis, and better organised collagen deposition with GHK-Cu.
Gene Regulation
4,000+
Research has identified over 4,000 human genes modulated by GHK-Cu, spanning wound healing, inflammation, collagen synthesis, and antioxidant defence pathways.
What to Track in Shotlee
Build a complete GHK-Cu application diary — doses, before/after photos, hair density, and healing metrics.
Application Log
Record every GHK-Cu application: date, product (topical or injectable), dose/concentration, and application site. Build a complete protocol history.
Skin Photos
Attach timestamped before/after skin photos to your log entries. Visual documentation of fine line reduction, texture, and wound healing is the primary outcome measure.
Hair Density
Log hair density estimates or trichoscopy results at regular intervals. For scalp application protocols, hair count or coverage ratings track follicle response.
Injection Site Notes
For injectable protocols: note injection site, any local reactions, and rotate sites systematically. Log site rotation to avoid repeated tissue exposure.
Before/After Metrics
Record objective skin measurements: skin elasticity scores if available, wrinkle depth, and wound dimensions at each checkpoint.
Lab Markers
For advanced monitoring: log serum copper, ceruloplasmin, and collagen biomarkers (PINP) if available. Track antioxidant markers (SOD activity) at baseline and follow-up.
Topical GHK-Cu for Skin vs Injectable for Systemic Effects
Topical GHK-Cu reaches the dermis through transdermal penetration when formulated with appropriate carriers (liposomes, nanoparticles, or low-molecular-weight vehicles). Clinical cosmetic studies show measurable improvements in skin density, elasticity, and fine line depth with consistent topical application over 8–12 weeks. This route is the most accessible and lowest regulatory barrier entry point for GHK-Cu use.
Injectable GHK-Cu bypasses the skin barrier entirely and achieves systemic distribution. Research protocols exploring hair follicle stimulation and systemic anti-ageing effects typically use 1–2 mg subcutaneously daily or every other day. Some researchers combine topical (face/scalp) with injectable (systemic) simultaneously — Shotlee lets you log both application types separately to track which is driving which outcomes.
Log Both Routes in Shotlee
If using GHK-Cu both topically and by injection, log each application separately in Shotlee with route, product, and site. Separate logs let you attribute skin vs systemic changes accurately.
Protocol FAQs
GHK-Cu is used topically as a cosmetic ingredient for skin rejuvenation, fine line reduction, wound healing, and scalp/hair support. Injectable GHK-Cu is a research peptide studied for systemic regenerative effects, collagen synthesis, hair follicle stimulation, and anti-ageing applications. Injectable use is not approved for human use in most jurisdictions.
Topical GHK-Cu is a cosmetic ingredient applied to skin or scalp, primarily targeting local collagen and elastin synthesis. Injectable GHK-Cu is a research peptide providing systemic distribution. Topical is legal and commercially available; injectable is in a research-only grey area. Track both routes in Shotlee to monitor outcomes separately.
Clinical cosmetic studies with topical GHK-Cu typically show measurable skin density and elasticity improvements over 8–12 weeks of consistent application. Log skin photos at baseline and every 4 weeks in Shotlee to build an objective before/after comparison.
Research protocols typically use 1–2 mg subcutaneously daily or every other day over a 4–8 week cycle. This is significantly higher than endogenous plasma concentrations and is strictly a research application.
Preclinical data suggests GHK-Cu stimulates hair follicle proliferation and extends the anagen (growth) phase, possibly through stem cell recruitment and improved follicle blood supply. There are no Phase 2/3 human clinical trials. Track hair density changes in Shotlee with regular trichoscopy or photo documentation.
References
- [1]ReviewPickart L, Vasquez-Soltero JM, Margolina A. "GHK Peptide as a Natural Modulator of Multiple Cellular Pathways in Skin Regeneration." Biomed Res Int. 2015;2015:648108.
- [2]ReviewPickart L, Margolina A. "Regenerative and Protective Actions of the GHK-Cu Peptide in the Light of the New Gene Data." Int J Mol Sci. 2018;19(7):1987.
- [3]Clinical TrialLeyden JJ, et al. "Treatment of photoaged facial skin with topical copper peptide." Cosmetic Dermatology. 2002;15:19-22.
Track Your GHK-Cu Protocol in Shotlee
Log topical and injectable applications, attach skin photos, track hair density, and monitor collagen markers — all free in Shotlee.
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