Shipping & Returns

We ship domestically within the United States. International orders are not currently fulfilled, and orders with a non-US shipping address will be cancelled and refunded.

• Flat-rate domestic shipping is $8. Shipping is free on orders over $50.
• Orders placed before 12:00 PM ET on a business day typically ship the same day. Orders placed after the cutoff, on weekends, or on US federal holidays ship the next business day.
• Once handed to the courier, transit time is usually 1 to 3 business days depending on your region.

Tracking is emailed when the label is created and is also available from your account page or the find order page.

Shipments leave in plain, unbranded outer packaging appropriate for laboratory reference materials. Product containers are sealed with tamper-evident closures.

Lyophilized peptides are stable at ambient temperature for the transit window we use. Compounds that benefit from cold-chain handling ship with insulation and gel packs at no additional cost. Refrigerate or freeze on arrival per the storage guidance on the product page and in the FAQ.

Because these are temperature- and integrity-sensitive reference standards, opened or reconstituted product is non-returnable.

• Sealed, unused product can be returned within 14 days of delivery for a refund of the product price, minus return shipping. Contact us before sending anything back so we can issue a return authorization.
• Defective shipments, meaning product damaged in transit, a COA mismatch, or missing items, are replaced or refunded in full. Contact us within 48 hours of delivery with photos and your order number.

Approved refunds are issued to the original payment method once the return is received and inspected, typically within 5 business days. Your bank may take additional time to post the credit.

If tracking shows delivery but the package is missing, contact us within 48 hours and we will open a trace with the carrier. We are not responsible for packages delivered to an incorrect address supplied at checkout, so please confirm your shipping address before completing payment.

For any shipping or return question, email seth@zolvir.com or use the contact form with your order number.