QSC vs Biotech Peptides: Selank Comparison | Purity, Shipping & COA
This page provides a side-by-side comparison of QSC and Biotech Peptides as sources for Selank research. Information about Biotech 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.
Biotech Peptides
Competitive US pricing, broad catalog, established presence
Best for: Budget-conscious US researchers comfortable with ≥98% purity specification
QSC vs Biotech Peptides: Selank Side-by-Side
Criteria
QSC Peptides
Biotech Peptides
Purity Specification
≥99%
≥98%
Testing Methods
HPLC + Mass Spectrometry
HPLC
COA Availability
Yes — Janoshik verified, published on every product page
Yes — available on request
Domestic Warehouses
USA, EU, UK, Canada, Australia
USA only
Domestic Shipping
Yes — all 5 regions
USA only
Typical Ship Time
2–7 days domestic
3–7 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
Limited
Purity & COA Transparency
QSC specifies ≥99% purity for Selank, verified by HPLC and mass spectrometry. Every product page includes a Certificate of Analysis independently verifiable via the Janoshik testing portal. Russian-approved anxiolytic heptapeptide. Lower global vendor availability than mainstream US peptides — QSC’s direct manufacture particularly relevant for sourcing consistency.
Biotech Peptides specifies ≥98% purity, tested by HPLC. COA availability: Yes — available on request.
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.
Biotech Peptides ships domestically from: USA only. ≥98% purity spec (lower than QSC’s ≥99%).
QSC Domestic Warehouse Coverage for Selank
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. Selank 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.
Biotech Peptides sources product from Third-party manufacturer. Manufacturing transparency and batch traceability differ accordingly.
Why researchers choose QSC over Biotech Peptides for Selank
QSC specifies ≥99% purity vs Biotech Peptides’ ≥98% — meaningful for quantitative research where concentration accuracy matters. QSC proactively publishes Janoshik-verifiable COAs rather than providing them on request. QSC offers domestic United States, European Union shipping unavailable through Biotech Peptides.
Frequently Asked Questions
Is QSC or Biotech Peptides better for Selank?
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 Biotech Peptides ship Selank to non-US researchers?
Biotech 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 Selank inventory in 5 regions to avoid these issues.
How does Biotech Peptides verify Selank purity?
Biotech Peptides uses HPLC with Yes — available on request. 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 Selank from QSC?
Yes. As the direct manufacturer, QSC can accommodate bulk orders and custom synthesis requests for Selank. 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.
