Are these products safe for human use?

No. All products are sold strictly for in-vitro and laboratory research use only. They are not for human or veterinary use, food, or any therapeutic application.

Do you provide a Certificate of Analysis?

Yes. Every batch ships with an independent third-party Certificate of Analysis. You can view or download the report for each lot directly on the product page.

What purity can I expect?

Our peptides are typically ≥99% pure by HPLC, with identity confirmed by mass spectrometry. Any material below specification is rejected at QC.

How is shipping handled?

Orders ship lyophilized and temperature-controlled with tracking worldwide. Cold-chain packing is used where required.

Do you offer OEM / ODM or wholesale pricing?

Yes. We support custom packaging, specifications and branding (OEM / ODM) as well as B2B wholesale supply. Contact us with your requirements for a quote.

Frequently Asked Questions

Answers to common questions about ordering, shipping, quality and custom synthesis.

Ordering & Shipping

How is international shipping handled?

Orders ship lyophilized and temperature-controlled with tracking worldwide, typically arriving within 5–10 business days from our US and Europe warehouses.

What payment methods do you accept?

We support Bank Transfer (T/T) and Wise — convenient methods to make ordering simple.

Is there a minimum order quantity?

There's no strict minimum for research vials. For bulk and wholesale volumes we offer tiered pricing — request a quote and we'll scope it with you.

Do you ship from a local warehouse?

Yes — a US warehouse (5–7 day delivery) and a Europe warehouse (7–10 day delivery) keep transit times reasonable across most regions.

Quality & Testing

Do all products come with a COA?

Yes. Every product page hosts the third-party Certificate of Analysis for that batch — view it or download the PDF directly, no account required.

What purity standard do you hold?

Our standard is ≥ 99% by HPLC. Any lot that falls below specification never leaves the QC bench.

Which tests are run on each batch?

Each lot is analyzed for HPLC purity, mass-spec identity, and endotoxin by an independent third-party laboratory.

Can I see the COA before ordering?

Absolutely — the batch report is published openly on the product page, so you can review it before you buy.

Custom Synthesis & OEM

Do you offer custom synthesis?

Yes — from milligram research quantities up to multi-gram scale, including modified sequences, isotope labeling and conjugation, all with full analytical data.

Can you do private label / OEM?

We offer OEM/ODM programs with custom vials, kitting and private-label packaging. Tell us your spec and we'll put together a plan.

What's the lead time for custom orders?

It depends on the sequence and scale. We quote a realistic lead time up front so there are no surprises.

General

What is the intended use?

All products are sold strictly for laboratory research use only and are not for human or veterinary use.

How do I confirm someone is your staff?

Use our verification tool. Our employees only use @crestpep.com addresses — enter the email or WhatsApp number to confirm an authorized representative.

How fast do you respond to inquiries?

A real person usually replies within hours on business days — typically under 24 hours.

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Can't Find Your Answer?

Our team answers ordering, quality and custom-synthesis questions directly — usually within hours.