Median retest purity
Across lots tested in the last 90 days.
Research peptides · Canadian owned
Research peptides for in vitro laboratory research.
Canadian-owned supplier of research peptides for in vitro laboratory research. Supplied strictly for laboratory use and shipped Canada-wide. Not for human or veterinary consumption or administration to any living subject.
Research use
In vitro only
For laboratory research only
Not for human or veterinary consumption or administration to any living subject.
Lots with a published certificate
Nothing is listed for sale without one.
Lots rejected this quarter
Generated from our rejection records, not written by hand.
Compounds in the catalogue
Each with its current lot code and retest result.
Testing
Understanding analytical testing.
Analytical reports can help assess a research material's identity and purity. The following explains common documentation and testing concepts; it does not establish that a particular product or lot has been tested.
Lot identification
A report should identify the sample and lot examined. Matching those identifiers to the material being evaluated helps establish whether the report is relevant to that specific batch.
Report details
Check the laboratory identity, report identifier, sample description and test date. Review the methods and any qualifications or limitations stated in the report.
Purity analysis
High-performance liquid chromatography, or HPLC, separates components under specified test conditions. A reported chromatographic purity percentage depends on the method, detection and calculation used; it does not necessarily represent total mass purity or detect every impurity.
Identity analysis
Mass spectrometry measures the mass-to-charge ratios of detected ions. Agreement with an expected result can support identification, but interpretation depends on the method and may require additional analytical evidence.
Result limitations
Results apply to the sample tested and the methods used. Identity and purity results alone do not establish sterility, stability, regulatory approval or safety for human or veterinary use.
Certificates
What to look for in a certificate of analysis.
When reviewing a certificate of analysis, check that it identifies the laboratory, sample, lot number, test date, methods and results. Confirm that the report corresponds to the material being evaluated. A certificate does not establish safety for human or veterinary use.
Certificate review checklist
Laboratory identity
Check
Sample and lot identification
Match
Test date
Check
Analytical methods
Review
Results and units
Review
Report authenticity
Verify
Catalogue
Listed by compound, size and lot.
Research materials grouped by compound format. These categories describe the material, not an intended application.
Single-compound vials
One synthetic peptide per vial, supplied as lyophilised powder. Sized by milligram and priced per size.
Multi-compound preparations
Two or more compounds in a single vial. Every listing states the milligram content of each component.
Metal-complexed peptides
Peptide–copper complexes supplied as lyophilised powder, retested on the same terms as every other lot.
Non-peptide research compounds
Small-molecule and cofactor compounds listed alongside the peptide range, each with its own lot code.
Singles and packs
Each size can be bought as a single vial or a pack of 10. Both draw from the same lot and carry the same certificate.
Lab supplies
Bacteriostatic water, acetic acid, syringes and vial storage.
Shipping & payment
Canada-only shipping. Usually dispatched same day before 1 PM Pacific.
Orders paid before 1 PM Pacific on a business day are usually dispatched the same day; otherwise the next business day. Typical delivery is two to five business days, longer for remote and northern addresses.
This website provides information about Pepz4u.
Carriers and tracking
Canada Post, Purolator, UPS and FedEx. A tracking number appears on your order status page as soon as the order is dispatched. Free Xpresspost on orders of 100 CAD and up; a flat rate applies below that.
Packaging
Lyophilised material ships in sealed vials, protected from light. Packaging is plain and does not identify the contents externally. Follow the storage conditions specified on the product label and applicable product documentation. Contact support if storage instructions are missing or unclear.
Interac e-Transfer
Send from any Canadian bank app using the reference code on your order. Autodeposit is on, so there is no security question. Your order ships once the transfer lands.
Replacements, not refunds
Damaged or incorrect items are replaced — contact us within 24 hours of delivery with photos. For a package that has not arrived, contact support so we can investigate and arrange a replacement if it is confirmed lost. Returns are not accepted because storage conditions cannot be verified once material leaves us.
Minimum order
Minimum order: CAD 40. Guest checkout is available; an account keeps your order history and certificates in one place.
Wholesale
Volume supply for laboratories and institutions.
Tiered pricing from 10 units, priced per compound and quoted within one business day. Wholesale lots are retested in Canada on the same terms as retail — no separate grade — and we can hold a lot against a standing order so your batch stays consistent.
Request a wholesale quote- Same retest policy and published certificates as retail
- Tiered volume pricing from 10 units
- Quoted per compound within one business day
- Reserved stock against standing orders
Research-use policy
Strictly for in vitro laboratory research.
All compounds supplied by Pepz4u are offered strictly for in vitro laboratory research. They are not intended for human or veterinary consumption, administration to any living subject, or use in diagnosing, treating, curing or preventing any condition.
Products are offered strictly for in vitro laboratory research. We do not provide dosing guidance, administration protocols or advice on human or veterinary use.
- Not for human or veterinary consumption
- Not for administration to any living subject by any route
- Purchasers must be at least 19 years of age
- By ordering you confirm you are a qualified researcher or purchasing on behalf of a research institution
- You accept responsibility for safe handling, storage and disposal under the regulations that apply where you are
- Orders may be refused or cancelled where intended use appears to fall outside laboratory research
Frequently asked questions
Testing, shipping, orders and research use.
What is a certificate of analysis?
A certificate of analysis is a document reporting analytical results for an identified sample or lot. Its usefulness depends on the sample identification, methods, results and authenticity of the report. It is not, by itself, proof of regulatory approval or safety.
How do I match a report to a lot?
Compare the report's sample description and lot identifier with the product label and accompanying documentation. A report for a different lot does not establish the results for the material you have. Ask the supplier or issuing laboratory to clarify any mismatch.
What does HPLC measure?
High-performance liquid chromatography separates components under specified conditions and measures their detector responses. Depending on the method, it can support purity assessment or quantification. Results depend on the method, detector, reference materials and calculation used.
What can mass spectrometry tell me?
Mass spectrometry measures mass-to-charge ratios of detected ions. Results can support a proposed identity when interpreted with appropriate reference information and other evidence. A matching mass alone may not distinguish all compounds or establish complete structural identity.
What does a reported purity percentage mean?
Its meaning depends on the analytical method and calculation. For example, an HPLC peak-area percentage is not necessarily a mass percentage and may not account for water, salts or substances the method does not detect. Review the report's methods and limitations before interpreting the number.
Does a certificate establish safety for human use?
No. Analytical results do not, by themselves, establish clinical safety, efficacy, sterility or suitability for administration. Materials offered for laboratory research must not be treated as approved products for human or veterinary use.
What should I check if a report is incomplete?
Check for the laboratory identity, report identifier, sample and lot details, test date, methods, results, units and stated limitations. Request missing information from the supplier or issuing laboratory rather than assuming that an omitted test was performed or passed.
How fast do you ship?
Orders paid before 1 PM Pacific on a business day are usually dispatched the same day; otherwise the next business day. Canada only — we do not ship internationally.
Is packaging safe?
Yes. Packaging is plain and does not identify the contents externally.
How can I pay?
Interac e-Transfer. Card payment will be added once our merchant account is approved.
How should lyophilised material be stored?
Follow the storage conditions specified on the product label and applicable product documentation. Contact support if storage instructions are missing or unclear.
Can I return an opened vial?
No. Storage conditions cannot be verified once material leaves us. Damaged or incorrect items are replaced — contact us within 24 hours of delivery with photos. For a package that has not arrived, contact support so we can investigate and arrange a replacement if it is confirmed lost.
Can you advise on how to use these?
No. Products are supplied for laboratory research only, and we do not provide dosing guidance, protocols or advice on use under any circumstances.
Support
Questions about an order, a lot number or a certificate?
We reply within one business day. We cannot advise on use of any compound — products are supplied for laboratory research only.
- support@pepz4u.com
- +1 672 985 8111
- Hours
- Monday to Friday, 9 am to 5 pm PT
- Response
- One business day
- Location
- British Columbia, Canada
Privacy
Privacy policy.
This policy describes privacy practices for the Pepz4u informational website.
Website tracking
This website does not use Meta Pixel, Google Analytics or other visitor-tracking tools. It does not provide on-site account registration, checkout or contact forms.
Information you send
If you contact Pepz4u by email or WhatsApp, your communication provides the contact details and message content you choose to send. This may include your name, email address, phone number, order reference and any attachments. Send only information relevant to your enquiry; do not send passwords or complete payment credentials.
Handling enquiries
Information submitted in a support enquiry is used to understand and respond to that enquiry. Depending on your request, this may involve reviewing relevant order information held on the separate ordering platform.
Email and WhatsApp
Email and WhatsApp communications also involve the providers of those services. Those providers process information under their own applicable terms and privacy policies. Opening a WhatsApp link takes you to a third-party service.
Orders and accounts
Review the privacy notices before creating an account or submitting transaction information.
Technical hosting information
The absence of visitor tracking does not mean that no technical information is processed. Website delivery requires network requests, and hosting infrastructure may record information such as IP addresses, requested pages, timestamps and error details. Contact us for questions about hosting records; this policy does not specify a verified hosting-log retention period.
Privacy questions and requests
Contact support@pepz4u.com to ask about personal information held by Pepz4u or to request access, correction or deletion, as applicable. Available rights and any retention obligations depend on the circumstances and applicable law. Do not include sensitive identity documents in an initial request.
Scope of this policy
This policy covers the informational website, Questions about the retention, handling or disclosure of information related to a specific enquiry can be directed to support@pepz4u.com.