Calibration Peptides supplies high-purity research peptides, compounds, and related materials for scientific investigation. Products are for research use only and are not for human use.

You can reach our team through the contact page or by emailing [email protected]. We are happy to help with order questions and documentation requests.

Peptides are short chains of amino acids that form specific sequences studied for structure, binding characteristics, and biochemical activity in research settings.

No. Products are sold for research use to qualified buyers and are not intended for clinical or therapeutic applications.

We accept major credit cards, including Visa, MasterCard, and American Express, and select business payment options. Contact support for institutional payments.

Orders can be modified or canceled within 30 minutes of purchase, before fulfillment begins. After that period, or once an order has shipped, it cannot be changed or canceled. Email support as soon as possible.

Orders placed before 2:00 PM Eastern Time, Monday through Friday, ship the same day via 2nd Day Air. P.O. Box orders ship via USPS. Orders outside the cutoff are not guaranteed to ship the same day. Most shipments deliver within two business days, although carrier or weather delays may occur.

No. We currently ship within the United States only.

You will receive a confirmation email with a tracking link as soon as your order ships.

Some items are shipped with appropriate packaging to maintain stability. See each product page for any special requirements.

Please contact support with your order number. We will coordinate with the carrier and help resolve the issue.

Email us with your order number and photos of the damage, product, and shipping label. Damaged products can only be replaced with proper photo documentation.

Store in a cool, dry place away from light. Some products may require refrigeration or freezing for long-term stability. Refer to the product label for specific guidance.

Our incoming API target is 99.7% purity before lyophilization. Finished-lot specifications are molecule-specific; the applicable product page and lot COA control.

Most products are supplied as lyophilized powders to support stability during shipment and storage.

Yes. For COAs issued May 2026 and later, testing includes sterility, endotoxin, purity, and net peptide content. Review the applicable lot COA; additional documentation is available upon request.

Yes. Contact support with the SKU and we will share current lot documentation where available.

We do not provide protocols, dosing, or administration guidance. All products are for laboratory research only and are not for human use.

Eligible unopened, unused items may qualify within 30 days of purchase. See the Refund Policy for eligibility, exclusions, and processing details, then contact support to initiate a review.

We may request institutional or business details to confirm the intended research use when appropriate.

RUO indicates products are supplied solely for laboratory investigation. They are not intended for human use, therapeutic applications, or diagnostics.