FAQ — Research Peptide Questions Answered | Peppy

Question 1

Who can purchase from Peppy?

Accepted Answer

Peppy sells exclusively to qualified researchers, independent laboratories, and academic institutions. All purchasers must confirm that products will be used strictly for in-vitro scientific research and not for human or veterinary use. We do not sell to individuals under 18.

Question 2

What countries do you ship to?

Accepted Answer

We currently ship within the United States. International shipping options are in development — sign up for our newsletter or contact us at info@peppyshop.com to be notified when your region becomes available.

Question 3

How are peptides packaged for shipping?

Accepted Answer

All lyophilised peptides are sealed in amber glass vials under inert atmosphere, packed with dry ice or refrigerant packs depending on transit time, and shipped in insulated boxes. Temperature logs are included with each shipment on request.

Question 4

How long does shipping take?

Accepted Answer

Standard orders ship within 1–2 business days of payment confirmation. Domestic transit is typically 2–5 business days via tracked courier. Expedited overnight shipping is available at checkout for time-sensitive research needs.

Question 5

What purity level do your peptides reach?

Accepted Answer

Every Peppy peptide is manufactured to ≥99% purity as verified by HPLC analysis. We do not list or ship any compound that falls below this threshold. Batch-specific purity figures are published on each product's Certificate of Analysis.

Question 6

What is a Certificate of Analysis (CoA) and how do I access mine?

Accepted Answer

A CoA is a third-party laboratory document confirming the identity, purity, and molecular weight of a specific batch. Every Peppy order includes a downloadable CoA. You can also request a CoA before purchase by emailing info@peppyshop.com with the product name and batch number.

Question 7

How is purity verified — HPLC, mass spec, or both?

Accepted Answer

We use both reversed-phase HPLC for purity quantification and ESI mass spectrometry for molecular identity confirmation. Both results appear on the CoA. This dual-verification approach ensures you receive exactly the compound described, at the stated purity.

Question 8

Are peptides tested for endotoxins?

Accepted Answer

Yes. All injectable-grade peptides undergo LAL (Limulus Amebocyte Lysate) endotoxin testing. Results are included on the CoA. Standard research-grade peptides are tested for microbial contamination but may not carry full endotoxin certification unless specified.

Question 9

How should I store lyophilised peptides?

Accepted Answer

Lyophilised (freeze-dried) peptides should be stored at −20 °C in a sealed, moisture-free environment. Avoid repeated freeze-thaw cycles. When stored correctly, most peptides remain stable for 12–24 months. Always check the product-specific CoA for recommended storage conditions.

Question 10

What solvent should I use for reconstitution?

Accepted Answer

The correct solvent depends on the peptide's amino acid composition. Hydrophilic peptides typically dissolve in sterile water or PBS. Hydrophobic peptides may require a small amount of DMSO or dilute acetic acid before aqueous dilution. Refer to the product page or CoA for solvent recommendations specific to each compound.

Question 11

How long is a reconstituted peptide solution stable?

Accepted Answer

Reconstituted solutions are generally stable for 7–14 days at 4 °C and up to 3 months when aliquoted and stored at −80 °C. Avoid repeated freeze-thaw cycles of reconstituted solutions. For long-term storage, keep peptides in lyophilised form and reconstitute only the volume needed.

Question 12

What does 'research use only' mean?

Accepted Answer

Research use only (RUO) means our products are intended solely for in-vitro laboratory research — cell culture studies, biochemical assays, and similar scientific applications. They are not approved for, and must not be used in, clinical trials, diagnostic procedures, or any form of human or animal administration.

Question 13

Are Peppy peptides FDA-approved?

Accepted Answer

No. Our peptides are research reagents, not drugs or medicines. They have not been evaluated or approved by the FDA for any therapeutic, diagnostic, or preventive use. Purchasing or using them as such would violate applicable law.

Question 14

Do I need an institutional affiliation to order?

Accepted Answer

An institutional affiliation is not strictly required, but all purchasers must agree to our research-use terms at checkout and confirm they are conducting legitimate scientific research. We reserve the right to request documentation of research intent and to decline orders that do not meet our compliance criteria.

Question 15

Can I cite Peppy peptides in a publication?

Accepted Answer

Yes. We encourage researchers to cite the source of their reagents in publications. Please reference Peppy (peppyshop.com) along with the product name, catalogue number, batch number, and purity as stated on the CoA. Contact us if you need additional documentation for your institution's requirements.

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