The Definitive Source for Research Peptides
Buy with confidence. 99%+ verified purity, transparent pricing, and guaranteed same-day shipping—built to respect your time and budget.
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The Reference Standard: Verified Purity for Peptide Research
Our Commitment to the Research Standard: Cosmic Peptides provides reference-grade peptides, proteins, and amino acid derivatives solely for rigorous scientific research and development. Our compounds are guaranteed to exceed 99% purity, sourced via advanced solid-phase peptide synthetic technology. Every batch undergoes rigorous, independent third-party analysis using advanced High-Performance Liquid Chromatography (HPLC) and Mass Spectrometry (MS).
The Cosmic Peptides Difference: We have deployed a proprietary, end-to-end lot-tracking system that ensures an ironclad chain of custody from initial receiving through testing, stock, and delivery. This industry-leading technology automatically syncs real-time batch metadata to the product page as fresh lots enter inventory, guaranteeing that the precise purity data and sequential lot number perfectly match the product you receive. This verified chain of custody eliminates research risk and guarantees precision accuracy for your critical studies.
99%+ Purity, Every Time
Not "spot checked." Not "randomly sampled." Every single lot.
See The Data First
COA, HPLC, and end-to-end tracking - you get it all before we ship. No faith required.
Third-Party Verified
Independent US labs test everything. We don't grade our own homework.
Ships Same Day
Order before 2PM CST, it goes out today. No "processing time" games.
Featured Research Peptides
Explore our most requested research compounds, each manufactured to the highest analytical standards with complete documentation and lot-specific certificates of analysis.
Bacteriostatic Water - 30ml
Why Researchers Choose Us Over "Discount" Suppliers
Because your research actually matters. Other suppliers cut corners on testing, ship slow, and make you trust them. We show you the data, ship same day, and let the results speak.
You Get The Testing Data. Before You Order.
COA, HPLC, mass spec for every lot. No "available upon request" BS. It's right there on the product page. Click, read, verify, buy.
Third-Party Labs Test Everything
Independent US labs. Not our cousin's friend's lab. Not "in-house testing." Real third-party verification every single time.
Ships Same Day. Actually.
Order before 2PM CST, it ships today. No "3-5 business days processing." No "high order volume delays." Same day means same day.
Questions Answered Within Hours, Not Days
Email support that actually responds. Usually under 2 hours. Real answers from people who know peptides, not generic copy-paste responses.
Four Steps. Zero Shortcuts. Every Single Batch.
Your research depends on reliable results. We're committed to rigorous testing and complete transparency at every stage. Here's exactly what happens before we ship.
Synthesis
Solid-phase peptide synthesis using pharmaceutical-grade reagents and the highest purity amino acids available. We start with the best materials to ensure consistent quality.
Purification
High-performance liquid chromatography (HPLC) purification to 99%+ purity on every batch. We systematically remove all synthesis by-products to deliver research-grade peptides.
Third-Party Analysis
Independent US laboratories conduct HPLC purity analysis and mass spectrometry identity verification. Unbiased testing you can trust.
Full Documentation
Complete Certificate of Analysis with all analytical data posted directly on each product page. Review the data before you order - full transparency, always.
Complete Research Documentation
Access comprehensive analytical data, research protocols, and technical documentation for every peptide in our catalog.
Certificates of Analysis
Complete COA with HPLC chromatograms, purity, identity, and quantification analysis for every batch.
Research Guides
Comprehensive guides for storage, handling, and general research protocols for peptides.
Product Knowledge Base
Wikipedia-style articles about each product with detailed information on every product page.
Important: Research Compliance Notice and Disclaimer
For Research Use Only – Not for Human or Veterinary Use. All products sold by Cosmic Peptides are intended strictly for laboratory research and analytical purposes by qualified professionals. These materials are not intended for human or animal use and are not approved for any therapeutic, diagnostic, or medical application.
Cosmic Peptides is a chemical supplier, not a compounding pharmacy or chemical compounding facility as defined under 503A of the Federal Food, Drug, and Cosmetic Act. Cosmic Peptides is not an outsourcing facility as defined under 503B of the Federal Food, Drug, and Cosmetic Act. Our products are not drugs, food, cosmetics, or dietary supplements and have not been evaluated by the FDA.
These products are intended for in vitro research only. Any use in humans or animals is strictly prohibited and may violate federal, state, or local laws, including the Federal Food, Drug, and Cosmetic Act. No therapeutic, diagnostic, or clinical application is implied or permitted.
The statements made on this website have not been evaluated by the US Food and Drug Administration. Our products are not intended to diagnose, treat, cure, or prevent any disease. The purchaser assumes all responsibility for compliance with applicable regulations and appropriate use of these research materials.