99%+ Purity
Lab-verified
Third-party tested by HPLC and mass spectrometry, with a lot-matched Certificate of Analysis on every vial. For laboratory research use only.
Retatrutide
Our best-selling triple-agonist research peptide — GIP, GLP-1 and glucagon receptor activity in a single lot-matched vial. Synthesized by solid-phase synthesis, verified to ≥99% by mass spectrometry, and backed by a downloadable Certificate of Analysis for every lot.
The Research Catalog
65 research compounds across 9 categories — each synthesized to analytical standards and verified against a lot-matched Certificate of Analysis.
Best Sellers
8 products
GLP-1 & Metabolic
4 products
Research Peptides
25 products
Peptide Blends
6 products
Nasal Sprays
3 products
Dissolving Strips
3 products
Bioregulators
7 products
Research Bundles
12 products
A standard you can verify.
We publish the proof, not the promise. Every lot is characterized by HPLC and mass spectrometry and released against a lot-matched Certificate of Analysis. The data travels with the vial.
- 01HPLC purityEvery lot assayed to 99% or higher before release.
- 02Mass-spec identityMolecular weight confirmed against the reference for each compound.
- 03Lot-matched COAA Certificate of Analysis tied to the lot number on your vial, on request.
- 04Manufactured in the USAProduced, tested and shipped domestically.
What 99% pure doesn't tell you.
Purity testing measures one thing. We test for the four things it can't see.
Every peptide supplier publishes a purity number. But HPLC and mass spectrometry — the tests behind that number — were never designed to detect contamination. They measure the molecule, not what's around it. A peptide can test 99.9% pure and still contain bacterial endotoxins, heavy metals, or microbial growth. The chromatogram won't show it. Most suppliers won't test for it. We do.
Toxic fragments left behind by dead bacteria.
Heat-stable. Survive sterilization. Biologically active on their own.
HPLC and mass spec measure chemistry. Endotoxins are biological remnants — invisible to both. A vial can be 99% pure and still loaded with them.
Endotoxins are biologically active. They trigger immune responses, inflammation, and cytokine release on their own — corrupting research data before the experiment begins.
The absence of living microbial contamination.
Cultured against USP standards. Not assumed from a clean chromatogram.
Purity tests don’t culture for bacteria, fungi, or yeast. Live contamination can grow in a vial that "passed" purity testing.
Microbial growth introduces unknown variables into every experiment. We test every batch against USP sterility standards.
Lead, arsenic, mercury, and cadmium introduced during synthesis.
Inorganic. Invisible to HPLC and mass spec. Detected only by ICP-MS.
Heavy metals are inorganic. HPLC and mass spec are blind to them entirely. They require a separate test (ICP-MS) most suppliers skip.
Heavy metals accumulate in biological tissue and produce confounding effects in long-term studies. We screen for all four primary contaminants on every batch.
Verification that every batch matches the last.
Multi-sample. Reference-tested. Reproducibility, audited.
Spot-checking one vial per run is industry standard. We pull multiple samples per batch and test against the same reference every time.
Reproducibility is the foundation of legitimate research. If batches drift, your data drifts with them.
Purity is the floor. Not the ceiling.
Find Your Compound
Not sure where to start? Explore the catalog by the pathway you're researching.
Bestselling Compounds
The research peptides our customers reorder most — led by Retatrutide, Tirzepatide and Semaglutide.
Synthesized, tested & shipped in the U.S.A.
Homegrown Peptides is built on documented quality control — produced domestically, tested before release, and fulfilled same-day from our own facility. When you order, you get the analytical paperwork to match.
The Standard in Research-Grade Peptides
Six commitments. Independently verified. Every one backed by a number, not a claim.
Featured Research Bundles
Curated multi-compound stacks — combined at a saving versus buying each vial individually. Every component ships with its lot-matched COA.
Certificates of Analysis & Safety Data
Every compound is independently third-party tested, with a lot-matched Certificate of Analysis (COA) and a GHS-format Safety Data Sheet (SDS) available for download.
A Standard You Can Verify
We publish the proof. Every product is backed by analytical testing and lot-level documentation — no guesswork, no black boxes.
Analytical Purity
≥99% purity verified by HPLC and mass spectrometry. Each lot is characterized before release so your assays start from a known baseline.
COA on Every Lot
A lot-matched Certificate of Analysis documents identity, purity, and analytical results — available for every product, every batch.
U.S. Manufacturing
Produced in the United States under documented quality control, then tested before any vial leaves the facility. Same-day domestic shipping.
From the Research Desk
Testing, handling and compound science, written for the bench. No hype, sources cited.
Frequently Asked Questions
Are these products third-party tested?
Yes. Every lot is tested for identity and purity before it ships, and a lot-matched Certificate of Analysis (COA) is available for each product. Purity is verified by HPLC and mass spectrometry to ≥99%.
What does 'Research Use Only' mean?
All products are supplied strictly for laboratory and research use only (RUO). They are not drugs, foods, supplements, or cosmetics, are not approved by the FDA, and are not intended to diagnose, treat, cure, or prevent any disease, or for human or veterinary consumption.
How fast do orders ship?
Orders placed before 2PM EST typically ship the same business day from our U.S. fulfillment center, in protective packaging with tracking provided. Free shipping on orders $300 and over.
How should these compounds be stored?
Store lyophilized material at -20°C, protected from light and moisture. Once reconstituted with bacteriostatic water for laboratory titration, refrigerate at 2–8°C. Always consult the product COA for compound-specific handling.
Do you provide a Certificate of Analysis?
Yes — a lot-matched COA is available for every product and every batch, documenting identity, purity, and analytical results. Contact our team if you need the COA for a specific lot.