GHK
Also known as: Glycyl-L-Histidyl-L-Lysine
GHK is the parent tripeptide Gly-His-Lys, originally isolated from human plasma by Loren Pickart (1973) as an activity that caused aged hepatocytes to synthesize proteins like younger tissue. It is DISTINCT from GHK-Cu, the 1:1 copper(II) complex tracked as a separate entry — but GHK binds copper readily in vivo, so in physiological environments the bare peptide rapidly associates with available Cu(II). Not FDA-approved for any indication; used in cosmetic and research contexts only.
Who's worth your money for GHK
Every current seller, ranked by independent evidence — Merit Score, latest COA purity, and live $/mg (size-normalized). Prices refresh daily. Rankings are never paid.
Top Merit pick
Highest Merit Score (96) of 17 scored sellers
$84.97 · 50mg
Best value
Lowest $/mg among scored sellers
$116 · 250mg · 99.7% purity
Most tested
1 independent COA on file
$67.00 · 70mg
Average price
$3.60/mg
Sellers
49
45-day trend
+9.6%
35 of 49 sellers have a current price· 2 stale hidden· 16 unverified hidden
Top Merit pick
🇺🇸 BioLongevity Labs96✓ verified at source · 23h ago
$1.70/mg -52.8% vs avg$84.97
50mg
no purityBuy code MERIT · 15% off- 🇺🇸 Reta One Labs95
✓ verified at source · 23h ago
$0.96/mg -73.4% vs avg$67.00
70mg
- 🇺🇸 Licensed Peptides95
✓ verified at source · 23h ago
$7.20/mg +100.1% vs avg$360
50mg
no purityBuy code MERIT · 5% off - 🇺🇸 Hydro Research Peptides91
✓ verified at source · 23h ago
$0.55/mg -84.7% vs avg$55.00
100mg
no purityBuy code MERIT · 15% off - 🇺🇸 Peptidology89
✓ verified at source · 23h ago
$0.64/mg -82.2% vs avg$39.00
61mg
no purity - 🇺🇸 Peptide Plugs89
✓ verified at source · 23h ago
$0.92/mg -74.5% vs avg$55.00
60mg
no purity - 🇺🇸 Sunrise Bioresearch88
✓ verified at source · 23h ago
$0.47/mg -87.1% vs avg$116
250mg
- 🇺🇸 Verified Peptides86
✓ verified at source · 23h ago
$0.50/mg -86.1% vs avg$49.99
100mg
- 🇺🇸 EZ Peptides85
✓ verified at source · 23h ago
$0.70/mg -80.5% vs avg$35.00
50mg
- 🇨🇳 Reta Peptide83
✓ verified at source · 23h ago
$0.58/mg -83.9% vs avg$58.00
100mg
no purity
Prices observed from public storefronts (last 24h), normalized to $/mg. "Evidence" is Merit's 0–100 Merit Score, derived only from observable verification evidence (methodology on /about); "Purity" is the latest independent COA. Some buy links are affiliate links — Merit may earn a commission at no extra cost to you, and where a vendor offers one, the code shown gets you a discount at their checkout. Affiliate status never affects price data, ranking, or the Merit Score (full policy on /disclosure). Research use only.
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About GHK
CAS
49557-75-7
Molecular formula
C14H24N6O4
Sequence
GHK
Typical dose range
1-2 mg/day subcutaneous injection (research protocols)
Half-life
~30-60 minutes
COAs for GHK
27 third-party tests across 8 vendors. Each card links to the full report.
For
GHK-Cu / KPV
by Ion Peptide· batch GHKPV60-06172026
For
GHK-Cu/KPV
by Ion Peptide· batch GK60-06242026
For
GHK-Cu / KPV
by Ion Peptide· batch GHK60-06092026
For
GHK-Cu/KPV
by Ion Peptide· batch GHK60-05052026
For
GHK Copper
by Sports Technology Labs· batch 2026-04-13
For
GHK-Cu/KPV
by Ion Peptide· batch GHK60-04172026
For
GHK-Cu/KPV
by Ion Peptide· batch GHKPV-04042026
For
GHK-Cu/BPC-157/Thymosin Beta-4
by Ion Peptide· batch GLOW-03162026
For
GHK-Cu/KPV/BPC-157/Thymosin Beta-4
by Ion Peptide· batch KLOW-03162026
For
GHK-Cu + HLA Sheet Mask 25ml
by Ion Peptide· batch N/A
For
GHK
by Optima Supply· batch OP-GHK-2N6P
For
GHK-Cu/KPV
by Ion Peptide· batch GKPV60-010826
For
GHK-Cu/KPV/BPC-157/Thymosin Beta-4
by Sunrise Bioresearch· batch KLODEC25-02
For
GHK-Cu/KPV/BPC-157/Thymosin Beta-4
by Ion Peptide· batch KW80-12192025
For
GHK-Cu/KPV/BPC-157/Thymosin Beta-4
by Ion Peptide· batch KLOW-112526
For
GHK-Cu/BPC-157/Thymosin Beta-4
by Ion Peptide· batch GW-1125
For
GHK-Cu/KPV/BPC-157/Thymosin Beta-4
by Ion Peptide· batch KW80-1125
For
GHK-Cu/KPV/BPC-157/Thymosin Beta-4
by Ion Peptide· batch KW8-1025
For
GHK-Cu/KPV/BPC-157/Thymosin Beta-4
by Ion Peptide· batch NA
For
GHK-Cu + BPC-157 + TB-500 (TB4)
by Mile High Compounds· batch GLW-070-MH-02
Purity not on file
For
GHK-Cu, AHK-Cu
by Ion Peptide· batch KVR-2026-F78301
Purity not on file
For
GHK-Cu Copper Peptide Conditioner
by Ion Peptide· batch 2026-02-05
Purity not on file
For
GHK-Cu Tallow Honey Balm
by Ion Peptide· batch 2026/02/02
Purity not on file
For
GHK-Cu Serum
by Reta One Labs
17 citations indexed for GHK
rct · 2027
Two-Part Study of the Effects of the X39 Patch on Circulating GHK and GHK-Cu Levels in Healthy Adults
The goal of this clinical trial is to investigate GHK and GHK-Cu blood levels pre- and post-intervention in healthy adults, and to investigate the efficacy of X39 patch on GHK and GHK-Cu blood levels in healthy adults compared to a placebo.
Study · 2026
Redox-Responsive GHK-Conjugated Sponge Spicules for Sustained Dermal Delivery and Enhanced Collagen Synthesis
Sponge spicules have emerged as promising biomaterial scaffolds due to their biocompatibility and unique structural properties; however, achieving stable and bioactive functionalization remains a key challenge.
Study · 2026
Copper peptide activated cascade catalysis for glucose regulation and hypoxia reversing in infected diabetic wound healing
Starvation therapy has emerged as a promising strategy in diabetic wounds treating by regulating glucose level to deplete microbial nutrients without inducing antimicrobial resistance. However, this process consumes large amounts of oxygen, exacerbating wound hypoxia and compromising therapeutic efficacy.
animal · 2026
The GHK-Cu delays aging in Caenorhabditis elegans via coordinated regulation of mitochondrial function and activation of DAF-16/SKN-1 pathways
Aging is a complex biological process characterized by progressive functional decline across tissues and increased susceptibility to age-related diseases, with oxidative stress being a key contributing factor.
animal · 2026
Middle-aged mice treated with GHK-Cu peptide administered intraperitoneally or intranasally show behavioral rescue but divergent hippocampal aging programs
Study · 2026
The Laccase-like Property of GHK-Cu and Its Applications in Colorimetric Sensing of Phenolic Compounds
Laccase plays an important role in the detection and degradation of phenolic compounds, but it is limited by its cost and stability. In this study, the laccase-like property of copper peptide (GHK-Cu) has been revealed.