QSC vs Core Peptides: GHK-Cu Comparison | Purity, Shipping & COA
This page provides a side-by-side comparison of QSC and Core Peptides as sources for GHK-Cu research. Information about Core Peptides is based on publicly available data from their website and is accurate to the best of our knowledge at time of writing.
QSC Peptides
Direct manufacturer · 5-region domestic shipping · ≥99% HPLC+MS · Janoshik COA · Custom synthesis
Best for: Researchers in EU, UK, AU, CA requiring domestic shipping; those needing ≥99% verified purity; bulk/custom synthesis requirements.
Core Peptides
Strong COA transparency, ≥99% purity, fast US shipping, credit card accepted
Best for: US researchers prioritising COA transparency and fast domestic shipping with credit card
QSC vs Core Peptides: GHK-Cu Side-by-Side
Criteria
QSC Peptides
Core Peptides
Purity Specification
≥99%
≥99%
Testing Methods
HPLC + Mass Spectrometry
HPLC + MS
COA Availability
Yes — Janoshik verified, published on every product page
Yes — third-party, on product page
Domestic Warehouses
USA, EU, UK, Canada, Australia
USA only
Domestic Shipping
Yes — all 5 regions
USA only
Typical Ship Time
2–7 days domestic
2–5 days (USA)
Payment Methods
Bitcoin, USDT ERC-20
Credit card, crypto
Minimum Order
No minimum
No minimum
Manufacturer
QSC — direct SPPS manufacturer
Third-party manufacturer
In-house SPPS
Yes — in-house solid-phase peptide synthesis
Not disclosed
Custom Synthesis
Yes
No
Purity & COA Transparency
QSC specifies ≥99% purity for GHK-Cu, verified by HPLC and mass spectrometry. Every product page includes a Certificate of Analysis independently verifiable via the Janoshik testing portal. Tripeptide-copper complex. Correct copper chelation ratio verified by MS at QSC — distinguishing properly chelated GHK-Cu from unchelated GHK peptide.
Core Peptides specifies ≥99% purity, tested by HPLC + MS. COA availability: Yes — third-party, on product page.
Domestic Shipping Coverage
QSC maintains domestic warehouses in USA, EU, UK, Canada, and Australia. Orders ship from the nearest warehouse — no customs, no international transit delays, typical delivery 2–7 days domestic.
Core Peptides ships domestically from: USA only. US-only domestic shipping.
QSC Domestic Warehouse Coverage for GHK-Cu
United States
2–5 days domestic · No customs
United Kingdom
2–4 days domestic · No customs
European Union
3–7 days domestic · No customs
Canada
3–7 days domestic · No customs
Australia
3–6 days domestic · No customs
Manufacturer vs Reseller
QSC is the direct SPPS manufacturer of every peptide it sells. GHK-Cu is produced in-house — synthesised, purified by preparative HPLC, lyophilised, and verified by mass spectrometry before distribution. Every batch is traceable to QSC’s own production records.
Core Peptides sources product from Third-party manufacturer. Manufacturing transparency and batch traceability differ accordingly.
Why researchers choose QSC over Core Peptides for GHK-Cu
Core Peptides is a strong competitor on purity and COA transparency — QSC matches on both. QSC’s primary advantages are domestic shipping to EU, UK, AU, and CA — regions Core Peptides cannot serve domestically — and direct manufacturer status enabling bulk pricing and custom synthesis.
Frequently Asked Questions
Is QSC or Core Peptides better for GHK-Cu?
The best choice depends on your location and requirements. Researchers in EU, UK, Australia, or Canada benefit significantly from QSC’s domestic warehouses in those regions — eliminating customs risk and reducing transit time vs vendors with US-only warehouses. For purity-sensitive quantitative research, QSC’s ≥99% specification with Janoshik-independent COA verification provides a higher and independently confirmable quality standard.
Does Core Peptides ship GHK-Cu to non-US researchers?
Core Peptides ships domestically from USA only. Researchers outside these regions receive international shipments, which may be subject to customs clearance, import duties, and extended transit. QSC maintains domestic GHK-Cu inventory in 5 regions to avoid these issues.
How does Core Peptides verify GHK-Cu purity?
Core Peptides uses HPLC + MS with Yes — third-party, on product page. QSC uses HPLC and mass spectrometry on every batch, with COAs proactively published on each product page and independently verifiable via the Janoshik portal.
Can I get custom synthesis or bulk pricing on GHK-Cu from QSC?
Yes. As the direct manufacturer, QSC can accommodate bulk orders and custom synthesis requests for GHK-Cu. Contact [email protected] with your research requirements.
Research Use Only: All products sold on qscpeptide.com are intended strictly for laboratory research purposes only. They are not approved for human consumption, veterinary use, or any other application. Researchers are responsible for understanding and complying with local regulations in their jurisdiction.
