PDRN vs GHK-Cu
Side-by-side comparison of PDRN and GHK-Cu: mechanism, half-life, dose range, safety profile, and vendor pricing.
Price snapshot
PDRN
GHK-Cu
PDRN
PDRN (Polydeoxyribonucleotide) is a biotechnological compound derived from salmon sperm DNA (Oncorhynchus mykiss) through extraction, purification, and fractionation. It consists of polynucleotide chains with molecular…
Lowest listed price: $34.95 across 1 listing
Full PDRN profileGHK-Cu
GHK-Cu is the copper(II) complex of the tripeptide glycyl-L-histidyl-L-lysine, a molecule Pickart and Thaler first pulled out of human plasma in 1973. The free peptide (GHK, C14H24N6O4) weighs about 340.4 Da; bind it 1:1…
Lowest listed price: $34.99 across 7 listings
Full GHK-Cu profileSide-by-side comparison
| Attribute | PDRN | GHK-Cu |
|---|---|---|
| Category | Skin & Hair | Skin, Hair & Aesthetics |
| Research Stage | Phase 4 | Approved/marketed as a topical cosmetic ingredient (Copper tripeptide-1) with supporting small human studies. Injectable use is preclinical/off-label, research-use-only, with no human clinical trials. |
| Mechanism of Action | PDRN exerts effects through two primary mechanisms: (1) Adenosine A2A receptor agonism — PDRN is hydrolyzed to deoxyadenosine fragments that activate A2A receptors on fibroblasts, endothelial cells, and macrophages. A2A activation stimulates VEGF production… | GHK-Cu works mostly as a copper shuttle and a signaling peptide. It binds Cu(II) with high affinity (log K around 16.4, close to albumin's 16.2) and can supply or regulate copper for copper-dependent enzymes like SOD1, lysyl oxidase, cytochrome c oxidase, and… |
| Half-Life | Short (oligonucleotides degraded rapidly; tissue effects persist longer) | ~30-60 min (plasma; approximate legacy figure, no robust modern human PK study) |
| Typical Dose Range | — | 200-500 mcg SC daily (community/RUO; no clinically established injectable dose) |
| Dosing Frequency | weekly | Once daily subcutaneous; some run 5 days on / 2 days off. Topical: 1-2x daily to cleansed skin. |
| Administration | Subcutaneous, Intradermal, Topical | Subcutaneous, Topical |
| Side Effects | — | Topical GHK-Cu is generally well tolerated; higher-concentration formulations (4-5%) raise the odds of irritation, redness, or stinging. Injectable use has no safety data from controlled trials; the main theoretical concern is copper accumulation with repeated… |
| Molecular Weight | No single value - PDRN is a heterogeneous mixture of deoxyribonucleotide polymers (chain lengths ~50-2000 bp, roughly 50-1500 kDa) rather than one defined molecule [PMID:19860658]. | Free peptide (GHK): 340.38 Da (C14H24N6O4). Copper complex (GHK-Cu): 401.9 Da (C14H22CuN6O4, neutral 1:1 Cu(II) complex). |
| Common Vial Sizes | — | 50 mg, 100 mg |
Price tracking
Price History
4 data points- OF
- BM
- Half Nattys
- BHG Labs
PDRN: potential benefits
- Wound healing acceleration - enhanced angiogenesis, fibroblast proliferation, and collagen synthesis
- Diabetic foot ulcer healing - supported by a randomized, double-blind, placebo-controlled trial (complete healing 37.3% vs 18.9% for placebo) [PMID:24483158]
- Skin rejuvenation - clinical studies suggest improved texture and elasticity, though a 2024 systematic review found the aesthetic evidence base inconsistent [PMID:39198280]
- Hair loss - preliminary evidence only; a small uncontrolled study in female pattern hair loss reported improved hair count and thickness (not established for androgenetic alopecia) [PMID:25524027]
- Anti-inflammatory tissue remodeling - reduction of pro-inflammatory cytokines via adenosine A2A receptor signaling
- Aesthetic skin treatments - widely used in South Korean and European clinical practice
GHK-Cu: potential benefits
- Stimulates type I collagen synthesis in human fibroblasts at low nanomolar-to-picomolar concentrations (PMID: 3169264)
- Increases glycosaminoglycans (dermatan/chondroitin sulfate) and upregulates decorin in wound models (PMID: 11121126)
- Modulates matrix metalloproteinases and their inhibitors, partially correcting the MMP-9/TIMP-1 imbalance in a smoke-induced emphysema model (PMID: 35936787)
- Drives tissue remodeling and chemoattracts macrophages, mast cells, and capillary cells to injury sites (PMID: 18644225)
- Modulates expression of ~4,000+ human genes via the Broad Institute Connectivity Map, including DNA-repair and antioxidant genes (PMID: 25302294)
- Increases stemness and proliferative potential of epidermal basal cells and keratinocytes (PMID: 23019153)
- Acts as an antioxidant and anti-inflammatory copper regulator in the context of aging (PMID: 22666519)
- Broad skin-regeneration effects on collagen, proteoglycans, MMPs, and immune/endothelial cell recruitment (PMID: 26236730)
Frequently asked
What's the difference between PDRN and GHK-Cu?
PDRN is a skin & hair that pdrn exerts effects through two primary mechanisms: (1) adenosine a2a receptor agonism — pdrn is hydrolyzed to deoxyadenosine fragments that activate a2a receptors on fibroblasts,…. GHK-Cu is a skin, hair & aesthetics that ghk-cu works mostly as a copper shuttle and a signaling peptide. it binds cu(ii) with high affinity (log k around 16.4, close to albumin's 16.2) and can supply or regulate copper…. The two differ in mechanism, half-life (Short (oligonucleotides degraded rapidly; tissue effects persist longer) vs ~30-60 min (plasma; approximate legacy figure, no robust modern human PK study)), and typical dose range.
Which has the longer half-life, PDRN or GHK-Cu?
PDRN has a half-life of Short (oligonucleotides degraded rapidly; tissue effects persist longer). GHK-Cu has a half-life of ~30-60 min (plasma; approximate legacy figure, no robust modern human PK study). Longer half-lives generally mean less frequent dosing but slower on/off kinetics.
Which is cheaper, PDRN or GHK-Cu?
Lowest listed price on BodyHackGuide: PDRN from $34.95, GHK-Cu from $34.99. Prices are pulled from the vendor listings tracked on BHG and change frequently. See the compare tables on each compound page for the current set of offers.
Can you stack PDRN and GHK-Cu?
Stacking depends on mechanism overlap, safety profile, and goals. PDRN and GHK-Cu should only be stacked after reviewing each compound's individual protocol page, side effect profile, and any published interaction data. Use the BodyHackGuide stack builder for a structured review before combining research compounds.
See current vendor prices
Listings from the vendors we track. Prices change often, so check the vendor before you buy.
Before you buy PDRN or GHK-Cu
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Related comparisons
Research use only. BodyHackGuide is a research and price-comparison reference. The compounds discussed on this page are not approved by the FDA for human consumption and are sold strictly for laboratory research. Prices shown are pulled from vendor listings tracked on BHG and are subject to change. We earn an affiliate commission on some outbound clicks, and every vendor is ranked on the same public, reproducible methodology. See editorial standards and affiliate disclosure.