Premium-Grade Peptides. Lab-Tested Purity. Fast U.S. Delivery.

At Peptide Inventory, we’re dedicated to supplying the highest quality research peptides for scientific, laboratory, and educational use. Our mission is to provide researchers with reliable, lab-tested peptides that meet strict purity and safety standards — exceeding the quality offered by competitors. With unmatched speed, value, and service, we aim to be the most trusted source for premium research compounds.

Built for Researchers, Backed by Science

We serve academic institutions, licensed laboratories, and independent researchers across the U.S. and internationally. Every peptide we supply undergoes third-party lab testing to confirm 99%+ purity, and is guaranteed free of contaminants, heavy metals, or bacterial endotoxins. You get exactly what you expect — clean, consistent, research-ready compounds.

Why Choose Peptide Inventory?

• ✅ Third-Party Lab Verified Purity (99%+)
  All of our products are tested by Vanguard Laboratory, an ISO/IEC 17025:2017 accredited quality assurance laboratory based in Olympia, Washington. This certification reflects the highest international standards for laboratory testing. We provide full Certificates of Analysis (COAs) and detailed purity documentation with every batch to ensure complete transparency and confidence in your research.

• 🚚 Same-Day U.S. Shipping
  Orders placed before 2 PM EST ship the same day, Monday through Friday — with fast, secure delivery nationwide.

• 💬 Responsive, Knowledgeable Support
  Need help or product guidance? Our U.S.-based team is here to assist researchers every step of the way.

• 💡 Trusted by Labs, Backed by Repeat Orders
  Our customer loyalty speaks volumes — researchers come back for the quality, consistency, and dependable experience we provide.

• 💵 Fair Pricing Without Compromise
  We keep our costs competitive without ever sacrificing quality — because science shouldn’t come with inflated margins.

For Research Use Only

All products offered by Peptide Inventory are strictly intended for laboratory research and in vitro use only. Our peptides are not intended for human use, consumption, or therapeutic applications.

Our Vision

We believe quality science starts with quality compounds. That’s why we’ve built Peptide Inventory to be more than just a supplier — we're your research partner. From metabolic and cognitive studies to recovery, growth, and beyond, we’re here to help you move your work forward with confidence.