Last Updated: August 27, 2026

At Zythex Labs, we are committed to maintaining product integrity, traceability, and clear standards for resolving order-related issues.

Zythex Labs supplies materials exclusively for laboratory, analytical, and research purposes. Due to the nature of these materials and the importance of maintaining an appropriate chain of custody, we cannot offer conventional product returns once an order has been delivered.

However, we will review and resolve qualifying order issues according to the policy outlined below.

1. Incorrect Orders

If Zythex Labs makes a fulfillment error and you receive the wrong product, labeled strength, or quantity, please contact our support team within 14 days of delivery.

After confirming the fulfillment error, we will arrange for the correct item to be sent at no additional cost.

If the original shipment needs to be returned, Zythex Labs will provide a prepaid return label and appropriate return instructions.

Resolution: Replacement at no additional cost
Contact Deadline: Within 14 days of delivery

2. Damaged Shipments

If a vial arrives broken, leaking, or with its seal compromised during transportation, please document the condition of both the affected product and the shipping package with clear photographs.

Please contact us within 7 days of delivery and provide the relevant order details and supporting photographs.

For orders covered by shipping protection, transit-related claims should be submitted through the applicable shipping-protection provider.

When a qualifying damage claim is handled directly by Zythex Labs and approved, a replacement will be shipped at no additional charge.

Resolution: Replacement
Contact Deadline: Within 7 days of delivery

3. Certificate of Analysis Discrepancies

If qualified independent laboratory testing indicates that a batch does not materially correspond with the Certificate of Analysis (COA) published for the applicable lot, please contact Zythex Labs Support.

Your request should include:

• Your order information
• The applicable lot or batch number
• Supporting independent laboratory documentation
• Any other relevant information regarding the reported discrepancy

Zythex Labs will review the submitted results and investigate the applicable lot.

If the discrepancy is verified, you may choose between a full refund or replacement. The affected lot will also be removed from available inventory while the matter is addressed.

Resolution: Full refund or replacement
Contact Deadline: Within 30 days of delivery

4. Lost, Stolen & Transit-Damaged Packages

How a lost, stolen, or transit-damaged shipment is handled depends on whether shipping protection was purchased with the order.

Orders With Shipping Protection

If shipping protection was purchased during checkout, claims involving packages that are lost, stolen, or damaged while in transit are handled through the applicable shipping-protection provider.

For the quickest resolution, please submit your claim directly through the provider and have your order number and relevant shipment information available.

Orders Without Shipping Protection

If shipping protection was not added to your order, please contact Zythex Labs Support with your order and shipment information.

We will review the circumstances of the shipment. However, refunds or replacements for unprotected shipments are not guaranteed and remain subject to our discretion.

5. Order Cancellations

Changed your mind before your order enters fulfillment?

A full cancellation and refund may be requested as long as a shipping label has not yet been created for the package.

Once a shipping label has been assigned, the order has entered the fulfillment process and can no longer be cancelled under our pre-shipment cancellation policy.

Resolution: Full refund
Cancellation Deadline: Before shipping-label creation

We recommend contacting Zythex Labs Support as soon as possible if you need to request a cancellation.

6. Items We Cannot Accept Back

For research-material integrity and chain-of-custody reasons, Zythex Labs cannot accept returns involving:

• Opened, reconstituted, or partially used vials
• Materials that have been improperly stored after delivery
• Products exposed to temperatures, light, or other conditions outside their specified storage parameters
• Damage occurring after successful delivery
• Bulk or custom-manufactured orders after production has started

Additional return, refund, or replacement requests may be declined when they fall outside the eligibility requirements or claim periods stated in this policy.

7. How to Submit a Request

To begin a return, refund, replacement, damage, or order-related request, please contact Zythex Labs Support.

When contacting us, please provide:

• Your order number
• Applicable lot or batch number, when relevant
• A clear description of the issue
• Clear photographs, when applicable
• Supporting laboratory documentation for COA discrepancy claims
• Any other relevant shipment or product information

Our team will review the submitted information and provide the appropriate next steps.

Depending on the circumstances, you may receive:

• Return instructions
• A prepaid shipping label
• Replacement authorization
• Disposal instructions
• Refund confirmation

Some damaged-product claims may be resolved without requiring the affected material to be shipped back.

Incorrect-item claims may require the original item to be returned using a prepaid shipping label provided by Zythex Labs.

8. Approved Refunds

Approved refunds will be returned to the applicable original payment method.

Replacement orders are subject to product availability.

Processing times associated with banks, card issuers, or payment providers may affect when an approved refund appears in the customer’s account.

9. Final Sale & Approval

Except for the qualifying circumstances specifically described in this policy, all sales are final.

Refunds, replacements, returns, cancellations, and other resolutions are subject to review and approval by Zythex Labs Support in accordance with this policy.

By completing a purchase from Zythex Labs, the customer acknowledges and accepts this Returns, Refunds & Replacement Policy.

10. Research Use Only

All products offered by Zythex Labs are supplied strictly as research materials for laboratory and analytical investigation.

Products are not intended for:

• Human use or consumption
• Veterinary or animal use
• Human or veterinary administration
• Diagnosis
• Treatment
• Disease prevention
• Therapeutic purposes

Storage, handling, product documentation, and analytical information provided by Zythex Labs relate exclusively to the handling and evaluation of research materials and should not be interpreted as directions for human or veterinary use.

11. Contact Zythex Labs Support

If you believe your order qualifies for a refund, replacement, cancellation, or other resolution under this policy, please contact us with the relevant order information.

Zythex Labs
Email: info@zythexlabs.com
Phone: (815) 364-7776
Mailing Address:
422 S Main Street #1157
Lombard, IL 60148
United States

Recommended page layout

Website par isko clean layout mein rakhein: top banner mein “Returns, Refunds & Replacement Policy”, uske neeche short introductory paragraph, phir numbered sections. Incorrect Orders, Damaged Shipments, aur COA Discrepancies ke andar Resolution aur Contact Deadline ko small highlighted information boxes mein show karein, taa-ke customer quickly policy samajh sake.

Footer mein is page ka link short naam se “Returns & Refunds” rakh sakte hain.