Frequently Asked Questions

Simply browse our products, select your desired peptides, add them to your cart, and proceed to checkout. We accept all major credit cards and offer secure payment processing. Your order will be processed immediately upon payment confirmation.

We accept all major credit cards including Visa, Mastercard, American Express, and Discover. All transactions are processed through secure, encrypted payment gateways to protect your information.

Orders can be modified or cancelled within 1 hour of placement. After this window, orders enter processing and cannot be changed. Contact support@peptidesoptimized.com immediately if you need to make changes.

Orders are processed within 0-2 business days. Standard shipping typically arrives within 5-7 business days. Express 2-day and overnight options are available at checkout. Every order includes free shipment protection.

Currently, we ship within the United States only. We are working on expanding our shipping capabilities. Sign up for our newsletter to be notified when international shipping becomes available.

Orders ship in secure, protective packaging, with each vial securely cushioned. In lyophilized (freeze-dried) form, these compounds are stable at room temperature in transit.

99% purity, verified on every batch's COA — the Certificate of Analysis is available on each product page.

Lyophilized (powder) peptides should be stored at -20°C for long-term storage or 2-8°C (refrigerator) for short-term. Once reconstituted, store at 2-8°C and use within 4-6 weeks. Always protect from light and avoid repeated freeze-thaw cycles.

Lyophilized peptides have a shelf life of 2+ years when stored properly at -20°C. Reconstituted peptides should be used within 4-6 weeks when refrigerated. Each product includes a batch-specific expiration date.

Reconstitution is done with bacteriostatic water. Use our on-site reconstitution calculator (peptidesoptimized.com/tools/peptide-calculator) to work out volumes for your research; step-by-step protocols are shared in our research community.

Bacteriostatic water is sterile water containing 0.9% benzyl alcohol as a preservative. It prevents bacterial growth and allows reconstituted peptides to remain stable for 4-6 weeks when refrigerated.

Yes — every batch is independently lab-tested by HPLC for purity and by mass spectrometry for identity, and the Certificate of Analysis is published for each batch on its product page.

Every order is backed by our 60-Day Money-Back Guarantee. Request a full refund within 60 days of delivery — just email support@peptidesoptimized.com with your order number. You don't need to return opened vials: research materials are stored and handled under your own lab's conditions, so for safety and integrity we don't accept returns of opened product. Approved refunds go back to your original payment method. If an order arrives damaged, incorrect, or is lost in transit, we'll reship it or refund you. See our full 60-Day Money-Back Guarantee at peptidesoptimized.com/money-back-guarantee.

Email us at support@peptidesoptimized.com for any questions or concerns. We typically respond within 24 hours on business days. You can also call us at 913-530-1815.

Yes, we offer competitive bulk pricing for research institutions and high-volume customers. Contact support@peptidesoptimized.com with your requirements for a custom quote. Bulk orders may also qualify for expedited shipping and dedicated support.