All 4 Pillar Labs peptides are guaranteed 99%+ pure. Each batch is independently tested by accredited U.S. laboratories using HPLC (High-Performance Liquid Chromatography) and Mass Spectrometry. We provide a Certificate of Analysis (CoA) with every order showing exact purity percentages, molecular weight verification, and amino acid sequence confirmation.

A Certificate of Analysis is an official lab document that verifies your peptide's quality. Key sections include: Purity (should be 99%+), Identity (confirms correct peptide via mass spec), Appearance (should match product description), and Endotoxin levels (should be below 1 EU/mg). Each CoA is batch-specific and available on product pages or included with your order.

Orders are processed within 0–2 business days. Standard shipping takes 3–5 business days from fulfillment. Every order includes free shipment protection. Lyophilized peptides don't require cold shipping—they're stable at room temperature. All orders ship in discreet, unlabeled packaging.

Currently, we ship to all 50 U.S. states. International shipping varies by country due to customs regulations on research materials. Contact our support team for specific country availability. All international orders may be subject to local customs fees and import duties.

4 Pillar Labs is a U.S.-based peptide research supplier committed to quality and transparency. We source from GMP-compliant manufacturers and conduct independent third-party testing on every batch at accredited American laboratories. Unlike other suppliers, we provide full Certificates of Analysis, maintain strict quality control, and back everything with our 99%+ purity guarantee.

All 4 Pillar Labs peptides are sold strictly for research, laboratory, and educational purposes only. They are not approved for human consumption, veterinary use, or any therapeutic application. By purchasing, you confirm you are a qualified researcher and will use products in accordance with all applicable laws and regulations.

We stand behind the quality of our research peptides and packaging. Refunds or replacements are issued only for products that arrive damaged or if an incorrect item was shipped. If your package arrives damaged, you must contact us within 24 hours of confirmed delivery and provide clear photos of the product, vial(s), and outer packaging so we can review the claim and initiate the appropriate resolution. For shipping-related issues (including lost, misdelivered, or stolen packages marked as delivered), resolution is handled directly through the shipping carrier. Any assistance we provide is on a case-by-case basis and subject to the carrier’s investigation and determination. Due to the nature of research materials, all sales are final. We do not accept returns or issue refunds on opened or unopened products unless there is verified damage upon arrival or a confirmed fulfillment error on our part.

You can reach our support team via email. We typically respond within 24 hours on business days.