FAQ

Every product on Puripep is sold strictly for in-vitro laboratory research and authorized professional use. They are not classified as medicinal products and are not intended for human consumption, cosmetics, food additives, or any unapproved application.

Puripep is a research-supply company. Our products are sold strictly for laboratory research purposes — not for clinical use, not for treatment, not for direct human or animal administration outside a licensed clinical context.

Refrigerated (2–8 °C) or, for long-term storage, in a −20 °C freezer. Properly stored, they remain stable for several years. Avoid repeated freeze-thaw cycles.

Once reconstituted, peptides should be kept refrigerated (2–8 °C) and used within the timeframe stated on the product page (typically 14–28 days, peptide-dependent).

Store bacteriostatic water in a cool, dry place, away from direct sunlight. It should not be refrigerated or frozen. Once opened, observe the manufacturer’s stated post-opening shelf life.

Most peptides are packaged in 3 ml borosilicate glass vials with 20 mm crimp seal. NAD+ and certain bulk SKUs ship in 10 ml vials. Each label carries the molecule name, lot number, fill weight and storage instructions.

Yes. Every peptide ships with a lot-specific CoA — sequence verification, mass-spec ID, HPLC purity, and where applicable endotoxin and water-content data.

Yes. Every batch is independently tested for identity and purity by accredited third-party laboratories. If a batch fails our release criteria it is destroyed; if a batch fails post-release re-test, every recipient is notified and the product is replaced at our cost.

Yes. Every vial carries a lot number printed on the label. The number maps one-to-one to the CoA, HPLC trace and mass-spec data archived for that batch.

Shipping is a flat $14.99 on every U.S. order, and free once your cart reaches $250. All shipments are tracked end-to-end.

Orders are delivered within 48 hours across the U.S. Temperature-controlled packaging is included for peptides that require it, at no extra cost.

Orders are packed and shipped Monday–Friday, excluding U.S. federal holidays. Most orders leave our facility within one business day of being placed.

Yes. Packages ship in plain, unbranded packaging with no Puripep marking on the outer label. The return address reads as a generic shipping handler — no indication of contents.

Most carrier-marked deliveries that are missing turn up within 24 hours. Contact the local carrier facility, file a missing-package claim, then forward the claim reference to contact@puripep.com and we will coordinate a reshipment.

Email contact@puripep.com with the corrected address before the order has left our facility. Once the shipment is in the carrier’s hands we cannot change the destination; you will need to redirect with the carrier directly.

Reach out within 30 minutes of placing the order. As a one-time courtesy we will apply the missed code as store credit toward a future order; we cannot refund the difference to the original payment method.

Our Bulk Offers SKUs include a 20 % volume discount versus the per-vial price. Verified labs running multi-vial studies can request a single-lot reservation quote via the lab account dashboard.

Email contact@puripep.com with your order number and a photo of the vial label within 7 days of delivery. The correct item ships the same or next business day at no cost; the incorrect item does not need to be returned.

We back every order with a fulfillment guarantee. If an item arrives damaged, is incorrect, or doesn’t arrive, we ship a free replacement — or refund it if it’s unavailable. Email contact@puripep.com with your order number and a photo; full terms are on our Returns & Refunds page.