Peptides / Recovery and repair

Metal complex · 3 amino acids · 401.9 Da

GHK-Cu

Not approvedBanned in sport

GHK-Cu is a copper peptide used in skin care as copper tripeptide-1, and it is not approved as a drug. Most studies are in animals and lab cells, on wound healing and lung injury, with a few small skin studies in people. PepBank shows 7 results on GHK-Cu from 2 studies in people, and 218 from animal and lab studies. The strongest evidence is a randomized trial in people. Data as of 2026-10-30.

Also known as Cu-GHK, Copper tripeptide, Copper tripeptide-1, GHK copper, Prezatide copper, CG-Copper peptide and 1 more

GHK-Cu is also in 2 blends: KLOW and GLOW.

3 amino acids, from first to lastGHK

Evidence level: Mostly animal studies218 of 226 results come from studies in animals and lab cells. 2 studies in people.

Results in people

3% of 226 results

Results in animals

123

54% of 226 results

Results in lab cells

42% of 226 results

From computer models

under 1% of 226 results

Overview

Key points

GHK-Cu, also called copper peptide, is a copper complex of a short peptide with three amino acids, and it is used as a cosmetic ingredient.¹
Results in people come from studies after laser skin resurfacing, and they are mixed.^2,3
In rats with wound chambers, injected GHK-Cu raised the dry weight of the chambers, more at higher concentrations.⁴
Neither the FDA nor the EMA has approved GHK-Cu as a drug, and WADA does not name it, though by the wording of its S0 class it is banned in sport.^5,6,7

GHK-Cu at a glance

What it is	Metal complex, 3 amino acids
Approval	Not approved for any use
In sport	Banned in sport (WADA S0)
Studies	69 studies with results. 41 of them gave GHK-Cu, with 226 results. 7 in people123 in animals95 in lab cells1 from computer models
Best study in people	Randomized controlled trial with 13 people (2006)
Clinical trials	1 registered: 1 active or planned, 0 with posted results
Community use	Skin rejuvenation and anti-aging (serum or cream); Hair thinning (scalp serum, sometimes with microneedling); Injected for anti-aging, sometimes stacked with other peptides

The science

What is GHK-Cu?

GHK-Cu (copper peptide) is a metal complex in which copper(II) binds a short peptide of three amino acids called glycyl-L-histidyl-L-lysine, or GHK.¹ MeSH describes the GHK peptide as found in human plasma.¹

As a cosmetic ingredient it is called copper tripeptide-1.¹ Other names include prezatide copper, Cu-GHK, GHK copper and copper tripeptide.¹ No drug developer is identified for it.⁸

Amino acids in the peptide chain¹

The history of GHK-Cu

1982
The oldest paper on GHK-Cu in PepBank is from 1982.⁹
2026February
A phase 2 randomized trial of a topical GHK-Cu gel for acute skin wounds in healthy adults started on 2 February 2026 and is still recruiting.^8,10
2026April
An FDA page on bulk drug substances for compounding, current as of 22 April 2026, lists GHK-Cu for injectable routes among substances nominated but withdrawn.⁵
2026September
WADA published its 2027 Prohibited List on 21 September 2026, which does not name GHK-Cu and names peptides as an example in its S0 class.⁷

GHK-Cu structure and chemistry

The key facts about the molecule. Long codes are in the closed section below.

Sequence, 3 amino acidsFrom the first amino acid to the last

G1H+K

Darker means more water-repelling+ and − show charge in the body

Structure

The peptide is a chain of 3 amino acids with no ring, and it holds one copper(II) ion bound to nitrogen atoms of glycine and histidine.¹

Formula

C₁₄H₂₂CuN₆O₄

Molecular weight

401.9 g/mol

CAS number

89030-95-5

Development

No drug developer identified. Trial sponsor: Hudson Biotech (NCT07437586). Highest phase: phase 2.

Identifiers

PubChem 10111685, UNII 6BJQ43T1I9, DrugBank DB14683

Full sequence, SMILES and InChIKey

Three-letter sequence
H-Gly-His-Lys-OH, copper(II) complex (1:1)

InChIKey
QMIFIFIYYPUVNU-ACMTZBLWSA-L

SMILES
C1=C(N=C[N-]1)C[C@@H](C(=O)N[C@@H](CCCCN)C(=O)[O-])NC(=O)CN.[Cu+2]

See charge, composition and 3D structure on the Scientific page

How does GHK-Cu work?

Its reference entries do not establish a receptor target for GHK-Cu, and animal studies report several effects^1,11,12,13

Mouse lungsGHK-Cu lowered a marker of oxidative damage after cigarette smoke.

Mouse colonGHK-Cu raised levels of the protein SIRT1 in induced colitis.

RoundwormsGHK-Cu raised the electrical potential of mitochondria and switched on a stress response pathway called DAF-16.

The reference entries for GHK-Cu do not establish a receptor target.¹ The mechanism results listed here come from mice, roundworms and mouse cells, so they are not from people.^11,12,13

In miceIn animalsIn lab cells

In mice with acute lung injury caused by LPS, GHK-Cu treatment reduced production of reactive oxygen species.¹⁴

The evidence

What GHK-Cu studies show

Results grouped by what the studies measured. Each card shows where its results come from.

Mostly animal studies218 of 226 results come from studies in animals and lab cells. 2 studies in people.

Skin, hair and wounds

71 results · 7 in people · 23 animal · 41 lab

In irradiated rats, GHK-Cu gel did not significantly change the area of poorly supplied skin compared with control ointment, and in mice with burns, GHK-Cu-liposomes increased a marker of blood vessel cells (CD31) in skin.^15,16

Top results

In patients after laser skin resurfacing, skin care with GHK‑Cu did not clear redness earlier than care without it. (Archives of facial plastic surgery, 2006)
In irradiated rats, GHK‑Cu gel did not significantly change the area of poorly supplied skin compared with control ointment. (Otolaryngology--head and neck surgery, 2013)
In mouse cells, GHK‑Cu helped gut lining cells heal after damage by DSS. (Frontiers in pharmacology, 2025)

Immune system and inflammation

37 results · 28 animal · 9 lab

In mice with lung fibrosis, GHK-Cu reduced inflammatory and scarring changes in the lung, including a lower level of the inflammation signal TNF-α in lung fluid.¹⁷

Top results

In mice with lung fibrosis, GHK‑Cu lowered the inflammation signal TNF-α in lung fluid. (Life sciences, 2020)
In animal and cell tests of induced inflammation, the GHK‑Cu filler gel lowered inflammatory markers. (Colloids and surfaces. B, Biointerfaces, 2025)
In mice with silicosis, GHK‑Cu reduced lung scarring. (Redox biology, 2024)

Cells, genes and aging

28 results · 19 animal · 9 lab

In roundworms, GHK-Cu extended lifespan and increased resistance to oxidative stress, and in mice exposed to cigarette smoke it restored the antioxidant glutathione in lung tissue.^11,13

Top results

In roundworms, GHK‑Cu extended lifespan. (Biogerontology, 2026)
In animal and cell tests of induced inflammation, the GHK‑Cu filler gel lowered reactive oxygen species. (Colloids and surfaces. B, Biointerfaces, 2025)
In mice exposed to cigarette smoke, GHK‑Cu lowered a marker of oxidative damage in lung tissue. (Frontiers in molecular biosciences, 2022)

Muscles and tendons

11 results · 9 animal · 2 lab

In rats after ACL surgery, knee looseness was smaller with GHK-Cu than with saline at 6 weeks but did not differ at 12 weeks, and in mice exposed to cigarette smoke, GHK-Cu reduced the loss of muscle weight.^18,19

Top results

In rats after ACL surgery, knee looseness was smaller with GHK‑Cu than with saline at 6 weeks. (Journal of orthopaedic research, 2015)
In mice exposed to cigarette smoke, copper peptide reduced the loss of muscle weight. (Journal of cachexia, sarcopenia and muscle, 2023)
In rats after ACL surgery, knee looseness did not differ between GHK‑Cu and saline at 12 weeks. (Journal of orthopaedic research, 2015)

Lungs and breathing

9 results · 9 animal

In mice with asthma, GHK-Cu reduced collagen build-up around the airways compared with PBS, and in smoke-exposed mice it reduced lung damage typical of emphysema.^11,20

Top results

In mice with lung fibrosis, GHK‑Cu reduced inflammatory and scarring changes in the lung. (Life sciences, 2020)
In mice exposed to cigarette smoke, GHK‑Cu reduced lung damage typical of emphysema. (Frontiers in molecular biosciences, 2022)
In mice with asthma, GHK‑Cu reduced collagen build-up around the airways compared with PBS. (Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie, 2023)

Stomach and gut

8 results · 6 animal · 2 lab

In mice with induced colitis, GHK-Cu improved the disease activity score and lessened weight loss.¹²

Top results

In mice with induced colitis, GHK‑Cu improved the disease activity score. (Frontiers in pharmacology, 2025)
In mice with induced colitis, GHK‑Cu reduced swelling of the colon. (Frontiers in pharmacology, 2025)
In mice with induced colitis, GHK‑Cu reduced shortening of the colon. (Frontiers in pharmacology, 2025)

All 2 studies in people

In people

In patients after laser skin resurfacing, skin care with GHK‑Cu did not clear redness earlier than care without it.

2006Archives of facial plastic surgery13 people

In people

A review of studies found that GHK‑Cu was linked to higher patient satisfaction after laser skin resurfacing.

2026Aesthetic surgery journal

All 69 GHK-Cu studies by area Open the Scientific page

Key GHK-Cu studies

Studies in people come first, then studies in animals and in the lab.

People
Effects of topical copper tripeptide complex on CO2 laser-resurfaced skin
Miller et al. 2006 · Archives of facial plastic surgery · 13 people · cited by 6
4 results
People
The Regenerative Potential of GHK-Cu in Aesthetic Medicine
Mokhtar et al. 2026 · Aesthetic surgery journal · cited by 0
8 results
Animals
Effects of topical copper tripeptide complex on wound healing in an irradiated rat model
Parker et al. 2013 · Otolaryngology--head and neck surgery : official journal of American Academy of Otolaryngology-Head and Neck Surgery · 23 subjects · cited by 0
4 results
Animals
In vivo stimulation of connective tissue accumulation by the tripeptide-copper complex glycyl-L-histidyl-L-lysine-Cu2+ in rat experimental wounds
Maquart et al. 1993 · The Journal of clinical investigation · cited by 84
10 results
Animals
Protective effects of GHK-Cu in bleomycin-induced pulmonary fibrosis via anti-oxidative stress and anti-inflammation pathways
Ma et al. 2020 · Life sciences · cited by 55
8 results

All 69 GHK-Cu studies

GHK-Cu clinical trials

ClinicalTrials.gov lists 1 trial of GHK-Cu. 1 is active or planned, and 0 have posted results. PepBank does not show trial results.

Solid bars are dates that happened. Hatched bars are planned dates. Data from ClinicalTrials.gov.

Topical GHK-Cu Gel for Acute Skin Wound Healing

Phase 2recruiting60 planned

Status and safety

Is GHK-Cu approved?

FDA

United States

Not approved

No approved medicine contains it.

EMA

European Union

Not approved

No approved medicine contains it.

WADA

Sport

Banned

On the 2026 Prohibited List, section S0.

No. Not approved for any use. Its most advanced trial is in phase 2. The FDA, the EMA and the other sources we use show no approval (as of 8 Oct 2026). Banned in sport (WADA S0).

Laws and labels change, so check the regulator for the current status.

GHK-Cu side effects and safety

PepBank has 5 safety results from studies of GHK-Cu. None of them come from studies in people, so they do not show what happens in people.

Safety results from studies (5)

In mice with silicosis, GHK‑Cu caused no significant toxicity in the whole body. (Redox biology, 2024)
In cells, GHK‑Cu did not damage skin cells. (Scientific reports, 2016)
In human skin cells in the lab, none of the tested factors, including copper peptide, was found toxic. (Plastic and reconstructive surgery. Global open, 2020)
In lab tests, GHK‑Cu applied after microneedle pretreatment caused no obvious skin irritation. (Pharmaceutical research, 2015)
In cells, GHK‑Cu did not change skin irritation markers significantly. (Scientific reports, 2016)

See every safety result on the Scientific page

Doses studied (12 shown)

The doses that these studies used. They are not recommendations.

Dose as reported	Class	Species	Route	Duration	Design	Source
0.2, 2 and 20 μg/g/day	Animal	mouse	intraperitoneal	Not reported	Study in live animals	Ma 2020
0.2 and 2 mg/kg	Animal	mouse	Not reported	Not reported	Study in live animals	Deng 2023
1 nM	Animal	zebrafish	Not reported	Not reported	Study in live animals	Hsiao 2020
0.3 or 3 mg/ml	Animal	rat	intra-articular injection	once weekly for 4 weeks, from week 2	Study in live animals	Fu 2015
0.3 mg/ml	Animal	rat	intra-articular injection	once weekly for 4 weeks, from week 2	Study in live animals	Fu 2015
0.2, 2 and 20 μg/g/day	Animal	mouse	intraperitoneal	Not reported	Study in live animals	Zhang 2022
15 mg/kg, 3 times per week	Animal	mouse	intranasal	3 months	Study in live animals	Tucker 2024
0.68% aq.	Lab	human	transdermal	48 h	Study on tissue taken from a body	Hostynek 2010
1 x 10(-9) mol/L	Lab	human	Not reported	Not reported	Study on cells in a dish	Pollard 2005
1 x 10 (-9) mol/L	Lab	human	Not reported	24 hours	Study on cells in a dish	McCormack 2001
1 nM	Lab	human	Not reported	Not reported	Study on cells in a dish	Gruchlik 2014
1-mM solution	Lab	Not reported	Not reported	Not reported	Study on cells in a dish	Molavi 2020

From the community

How people use it

What people report online. It comes from forums and guides, not from studies.

Community-reported. Not tested in trials.

Most people use GHK-Cu as a skin or scalp serum. A growing group injects it under the skin for anti-aging, usually 1 to 2 mg a day in cycles, but no published human study covers the injected form.

Reported routines and cautions

What people use it for

Skin rejuvenation and anti-aging (serum or cream)S1S2
Hair thinning (scalp serum, sometimes with microneedling)S1S2
Injected for anti-aging, sometimes stacked with other peptidesS1S3

Reported regimens

Regimens that community sources report for GHK-Cu. Community-reported, not tested in trials.
Context	Route	Amount	How often	How long	Agreement	Sources
Skin rejuvenation, topical serum	topical (serum or cream)applied to clean skin	0.05 to 3 % GHK-Cu serum per application	once daily	8 to 12 weeks, then ongoing	sources differ: S1 says 1 to 3 percent, S2 says 0.05 to 2 percent; both say daily. Both sources carry seller links.	S1S2
Anti-aging, injected under the skin	subcutaneous injection	1 to 2 mg per dose	once daily, or 3 to 5 times per week	4 to 8 weeks on, 2 to 4 weeks off (S2: 30 days on, 30 days off)	sources differ: amount (1 to 2 mg) and daily use agree; cycle length differs (4 to 8 weeks vs 30 days on and off). The two sources for the amount carry seller links.	S1S2S3
Hair thinning, scalp serum	topical (scalp)some users add microneedling	0.5 to 2 % GHK-Cu serum per application	once daily	12 weeks or more (S2: 3 to 6 months)	sources differ: S1 says 1 to 2 percent, S2 says 0.5 to 1 percent; both say daily for at least 12 weeks. Both sources carry seller links.	S1S2
Microneedling with topical GHK-Cu (niche)	topical, after microneedling	1 to 2 % GHK-Cu serum per application	1 to 2 times per week (microneedling sessions)	8 to 12 weeks	single source. The source carries seller links.	S1

Reported side effects

topical: mild redness, tingling, brief contact irritation, drynessS2
injected: injection-site irritation and infection; a clinician reports patients with raised liver enzymes and raised copper after self-injectingS3

Reported benefits (claims, not shown in trials)

firmer skin, fewer fine lines, thicker hair with consistent topical use (self-reported)S1

Cautions

Topical outcomes have reasonable published support. Injected outcomes are largely anecdotal.S1
No data from published human studies show that injecting GHK-Cu is safe and effective. Dermatologists quoted by NPR advise patients to hold off.S3
S1 says the potential toxicity of injected copper peptide at higher systemic levels has not been well characterized. S2 lists Wilson's disease and known copper overload disorders among the main contraindications.S1S2
S3 says many people source injectable GHK-Cu from a grey market of online sellers.S3

Status notes

As of the September 2026 NPR report, US compounding pharmacies are not technically allowed to offer GHK-Cu for injection. The FDA advisory committee is to review injectable GHK-Cu at a meeting in February 2027.S3 S4
A law-firm note says topical GHK-Cu was restored to FDA compounding Category 1 (temporary enforcement discretion) in May 2026. Category 1 is not an approval.S4 S5

Community sources

S1GHK-Cu: Community Protocols & Reportspeptideprotocolwiki.comcarries seller links, not linked
S2GHK-Cu: Benefits, Dosage & Side Effectsoutliyr.comcarries seller links, not linked
S3The copper peptide trend has gone from creams to injections, ahead of the science (NPR) (opens in a new tab)wamc.org (NPR)
S4BPC-157 After the July 2026 PCAC Vote (regulatory note, includes GHK-Cu) (opens in a new tab)djholtlaw.com
S55 things to know about the FDA's peptide reversal (opens in a new tab)ajmc.com

Gaps

Only one non-seller source (S1) gives amounts. S2 carries affiliate or shop links, so it is marked seller-linked. No readable forum threads were found (Reddit is blocked). Injection regimens have no independent second source. S4 is a law firm that writes for clinics. The exact status of topical GHK-Cu after May 2026 was not checked against an FDA page. S4 shows an April 2026 date but describes the July 2026 vote, so its date is unreliable.

Questions and more

Common questions

What benefits do studies report for GHK-Cu?

In people, a systematic review of clinical studies reported better patient satisfaction after laser skin resurfacing with GHK-Cu.³ In zebrafish larvae, GHK-Cu reduced the movement of neutrophils, a type of white blood cell, to inflamed sites.²¹ In animal and cell tests of induced inflammation, a GHK-Cu filler gel lowered inflammatory markers.²² See what GHK-Cu studies show

What results did people see in GHK-Cu studies?

In a small randomized trial of 13 patients after CO2 laser skin resurfacing, skin care with GHK-Cu did not clear redness earlier than care without it.² PepBank lists 7 results from 2 studies in people.⁹ ClinicalTrials.gov lists no posted results yet for the registered GHK-Cu trial.¹⁰ See what GHK-Cu studies show

Is GHK-Cu safe?

It is not known.⁵ FDA says compounded injectable drugs with GHK-Cu may pose a risk of immune reactions, and there are limited data in humans.⁵ Forum and guide reports mention mild redness, tingling and dryness from topical use, and irritation and infection at injection sites.²³ PepBank lists 5 safety results from studies.⁹ See GHK-Cu side effects and safety

What do users report about GHK-Cu?

Users report using GHK-Cu as a skin serum or cream, on the scalp for hair thinning, and by injection.²³ They describe firmer skin, fewer fine lines and thicker hair with consistent topical use.²³ These are reports from forums and guides, not trial results.²³ A clinician reports patients with raised liver enzymes and raised copper after self-injecting.²³ See how people use it

Ask a question about GHK-Cu

The answer links to every study it uses.

What does the evidence say about GHK-Cu?Is GHK-Cu tested in people?Compare with Thymosin beta-4 (human)Compare with BPC-157

Sources

Database: PepBank profile: identity and structure (GSRS PREZATIDE COPPER (UNII 6BJQ43T1I9); GSRS BISPREZATIDE COPPER (UNII DL1TR6W6VM); GSRS PREZATIDE (UNII 39TG2H631E))
People: Miller et al., 2006, Archives of facial plastic surgery (PMID 16847171)
People: Mokhtar et al., 2026, Aesthetic surgery journal (PMID 42619529)
Animals: Maquart et al., 1993, The Journal of clinical investigation (PMID 08227353)
Regulator: FDA (United States) status record, as of 2026-10-08
Regulator: EMA (European Union) status record, as of 2026-10-08
Regulator: WADA Prohibited List 2026
Database: Development record
Database: PepBank data for GHK-Cu (data version 308541)
Trial registry: ClinicalTrials.gov NCT07437586: Topical GHK-Cu Gel for Acute Skin Wound Healing
Animals: Zhang et al., 2022, Frontiers in molecular biosciences (PMID 35936787)
Animals: Mao et al., 2025, Frontiers in pharmacology (PMID 40672369)
Animals: Wen et al., 2026, Biogerontology (PMID 42084774)
Animals: Park et al., 2016, Oncotarget (PMID 27517151)
Animals: Parker et al., 2013, Otolaryngology--head and neck surgery (PMID 23744835)
Animals: Wang et al., 2017, Wound repair and regeneration (PMID 28370978)
Animals: Ma et al., 2020, Life sciences (PMID 31809714)
Animals: Fu et al., 2015, Journal of orthopaedic research (PMID 25731775)
Animals: Deng et al., 2023, Journal of cachexia, sarcopenia and muscle (PMID 36905132)
Animals: Zhang et al., 2023, Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie (PMID 37257226)
Animals: Hu et al., 2026, European journal of pharmacology (PMID 41997403)
Animals: Hu et al., 2025, Colloids and surfaces. B, Biointerfaces (PMID 40716276)
Community: Community sources (forums and guides), as summarized in the PepBank community file

AI wrote this page from the sources above. AI can make mistakes, so check important facts against the source.

PepBank is a research reference. Talk to a doctor before you use any peptide.

Ask your AI about GHK-Cu

Curo is a peptide shop. PepBank and Curo have the same owner. See the Curo catalog (opens in a new tab).

GHK-Cu

Not approvedBanned in sport

Also known as Cu-GHK, Copper tripeptide, Copper tripeptide-1, GHK copper, Prezatide copper, CG-Copper peptide and 1 more

GHK-Cu is also in 2 blends: KLOW and GLOW.

What it is

Metal complex, 3 amino acids

Approval

Not approved for any use

In sport

Banned in sport (WADA S0)

Studies

69 studies with results. 41 of them gave GHK-Cu, with 226 results.
7 in people123 in animals95 in lab cells1 from computer models

Best study in people

Randomized controlled trial with 13 people (2006)

Clinical trials

1 registered: 1 active or planned, 0 with posted results

Community use

Skin rejuvenation and anti-aging (serum or cream); Hair thinning (scalp serum, sometimes with microneedling); Injected for anti-aging, sometimes stacked with other peptides

Dose as reported

Class

Species

Route

Duration

Design

Source

0.2, 2 and 20 μg/g/day

Animal

mouse

intraperitoneal

Not reported

Study in live animals

Ma 2020

0.2 and 2 mg/kg

Animal

mouse

Not reported

Study in live animals

Deng 2023

1 nM

Animal

zebrafish

Not reported

Study in live animals

Hsiao 2020

0.3 or 3 mg/ml

Animal

rat

intra-articular injection

once weekly for 4 weeks, from week 2

Study in live animals

Fu 2015

0.3 mg/ml

Animal

rat

intra-articular injection

once weekly for 4 weeks, from week 2

Study in live animals

Fu 2015

0.2, 2 and 20 μg/g/day

Animal

mouse

intraperitoneal

Not reported

Study in live animals

Zhang 2022

15 mg/kg, 3 times per week

Animal

mouse

intranasal

3 months

Study in live animals

Tucker 2024

0.68% aq.

Lab

human

transdermal

48 h

Study on tissue taken from a body

Hostynek 2010

1 x 10(-9) mol/L

Lab

human

Not reported

Study on cells in a dish

Pollard 2005

1 x 10 (-9) mol/L

Lab

human

Not reported

24 hours

Study on cells in a dish

McCormack 2001

1 nM

Lab

human

Not reported

Study on cells in a dish

Gruchlik 2014

1-mM solution

Lab

Not reported

Study on cells in a dish

Molavi 2020

Context

Route

Amount

How often

How long

Agreement

Sources

Skin rejuvenation, topical serum

topical (serum or cream)applied to clean skin

0.05 to 3 % GHK-Cu serum per application

once daily

8 to 12 weeks, then ongoing

sources differ: S1 says 1 to 3 percent, S2 says 0.05 to 2 percent; both say daily. Both sources carry seller links.

S1S2

Anti-aging, injected under the skin

subcutaneous injection

1 to 2 mg per dose

once daily, or 3 to 5 times per week

4 to 8 weeks on, 2 to 4 weeks off (S2: 30 days on, 30 days off)

sources differ: amount (1 to 2 mg) and daily use agree; cycle length differs (4 to 8 weeks vs 30 days on and off). The two sources for the amount carry seller links.

S1S2S3

Hair thinning, scalp serum

topical (scalp)some users add microneedling

0.5 to 2 % GHK-Cu serum per application

once daily

12 weeks or more (S2: 3 to 6 months)

sources differ: S1 says 1 to 2 percent, S2 says 0.5 to 1 percent; both say daily for at least 12 weeks. Both sources carry seller links.

S1S2

Microneedling with topical GHK-Cu (niche)

topical, after microneedling

1 to 2 % GHK-Cu serum per application

1 to 2 times per week (microneedling sessions)

8 to 12 weeks

single source. The source carries seller links.

GHK-Cu

Key points

GHK-Cu at a glance

What is GHK-Cu?

The history of GHK-Cu

GHK-Cu structure and chemistry

How does GHK-Cu work?

What GHK-Cu studies show

Skin, hair and wounds

Immune system and inflammation

Cells, genes and aging

Muscles and tendons

Lungs and breathing

Stomach and gut

All 2 studies in people

Key GHK-Cu studies

GHK-Cu clinical trials

Is GHK-Cu approved?

GHK-Cu side effects and safety

How people use it

What people use it for

Reported regimens

Reported side effects

Reported benefits (claims, not shown in trials)

Cautions

Status notes

Community sources

Common questions

What benefits do studies report for GHK-Cu?

What results did people see in GHK-Cu studies?

Is GHK-Cu safe?

What do users report about GHK-Cu?

Ask a question about GHK-Cu

Related peptides

AHK-Cu vs GHK-Cu

Sources

GHK-Cu

Key points

GHK-Cu at a glance

What is GHK-Cu?

The history of GHK-Cu

GHK-Cu structure and chemistry

How does GHK-Cu work?

What GHK-Cu studies show

Skin, hair and wounds

Immune system and inflammation

Cells, genes and aging

Muscles and tendons

Lungs and breathing

Stomach and gut

All 2 studies in people

Key GHK-Cu studies

GHK-Cu clinical trials

Is GHK-Cu approved?

GHK-Cu side effects and safety

How people use it

What people use it for

Reported regimens

Reported side effects

Reported benefits (claims, not shown in trials)

Cautions

Status notes

Community sources

Common questions

What benefits do studies report for GHK-Cu?

What results did people see in GHK-Cu studies?

Is GHK-Cu safe?

What do users report about GHK-Cu?

Ask a question about GHK-Cu

Related peptides

AHK-Cu vs GHK-Cu

Sources