A peptide catalog lists research compounds with purity data, COAs, and pricing. Learn how to read listings, verify vendors, and stay compliant before buying.
A peptide catalog is an organized, searchable listing of peptides sold mainly for laboratory research, along with details such as purity, molecular data, vial size, and price. It functions as a reference index and a storefront at the same time. Most peptides sold through these catalogs are not FDA-approved for human use, so a catalog is a research tool rather than a treatment guide.
What a Peptide Catalog Usually Includes
Reputable catalogs present the same core data for every compound, which lets buyers compare listings on equal terms. When a catalog hides this information, that is a warning sign.
- Catalog and lot number – needed to match a certificate of analysis to the exact vial you receive.
- Sequence and molecular weight – confirms the identity of the compound.
- Purity percentage – usually measured by HPLC and commonly reported between 95% and 99%.
- Form and size – lyophilized powder, solution, or capsules, listed in milligrams.
- Storage instructions – refrigeration or freezing requirements.
- Certificate of analysis (COA) – the lab report backing the purity claim.
How to Read a Single Listing
Two catalogs can list the same peptide and still describe very different products. The table below shows which fields carry the most weight when you are scanning a product page.
| Listing field | What it tells you | Why it matters |
|---|---|---|
| Purity (%) | Share of the vial that is the target molecule | Lower purity means more unidentified material per unit |
| Sequence / MW | Exact identity of the compound | Helps prevent mix-ups between similar peptides |
| Form | Powder, liquid, or capsule | Affects handling, storage, and measurement |
| Vial size (mg) | Total quantity per unit | Lets you calculate true cost per milligram |
| Lot number | Production batch identifier | Links your vial to a specific lab report |
| COA date | When the batch was tested | Older reports may not reflect current stock |
Categories You'll See in Most Catalogs
Catalogs usually group compounds by research area, which makes browsing faster but can also blur important differences between them.
- Repair and tissue-research peptides such as BPC-157 and TB-500.
- Metabolic fragment peptides such as AOD-9604, a shortened peptide derivative of human growth hormone.
- Growth hormone secretagogues such as ipamorelin and CJC-1295.
- Cosmetic and topical peptides such as GHK-Cu.
- Compounded or prescription peptides that require a licensed pharmacy and a clinician.
Form matters as much as the name. A listing for aod 9604 peptide capsules describes an oral product with a fixed amount per capsule, while a powdered version must be reconstituted and measured with a syringe. Someone comparing the aod 9604 peptide dose cited in a research paper with a capsule label will often find the two numbers are not directly comparable.
Purity, COAs, and Third-Party Testing
A certificate of analysis is only useful if it comes from an independent laboratory and matches the lot number printed on your vial. A COA generated on the seller's own bench, or one with no lot number at all, does very little to verify what you actually received.
Look for HPLC purity data plus mass spectrometry confirmation. Mass spec shows that the molecule's weight matches the expected sequence, while HPLC shows how much of the sample is that molecule. Catalogs that publish both are generally more transparent than those that post a purity percentage alone.
Purity above 98% on a third-party COA still does not make a research peptide safe or legal for human use.
Comparing Catalogs and Vendors
Price per milligram is the easiest number to compare and the least informative on its own. The table below covers the criteria that separate a well-documented catalog from a bare storefront.
| Criteria | Strong signal | Weak signal |
|---|---|---|
| Testing | Independent, lot-specific COA with HPLC and mass spec | Purity claim with no supporting report |
| Traceability | Lot numbers printed on vials and searchable | No batch information anywhere |
| Labeling | Clear "for research use only" disclaimers | Human-use language or dosing advice |
| Pricing | Transparent cost per milligram | Bundles that obscure unit price |
| Support | Documented storage and handling guidance | Marketing-only product pages |
Anyone searching where to buy bpc-157 peptide will find dozens of storefronts with near-identical layouts. Availability is not the same as approval, and a polished catalog page is not evidence of quality. In the same way, people who search buy aod-9604 peptide are usually looking at the same handful of listings republished across multiple sites.
Legal Status and Safety Basics
In the United States, most peptides sold through research catalogs are not FDA-approved for human use. The FDA has issued warning letters to companies marketing them as supplements or drugs, and some states add their own restrictions.
- Research chemicals are sold with "not for human consumption" labeling.
- Importing peptides for personal use can create customs and legal problems.
- Unregulated products may contain the wrong compound, the wrong concentration, or contaminants.
- Anyone considering a peptide for a health condition should speak with a licensed healthcare professional first.
Compounded peptides obtained through a licensed pharmacy with a valid prescription sit in a different category than research vials, though even compounded products carry risks and are not interchangeable with FDA-approved drugs.
A Practical Checklist Before You Order
- Confirm the listing includes a lot-specific, third-party COA.
- Compare cost per milligram across at least three catalogs.
- Check that storage and shipping instructions match the compound's stability needs.
- Read the legal disclaimers and understand what you are actually buying.
- Keep documentation on file if you are conducting laboratory research.
A peptide catalog is most useful as a research reference when you treat every listing as a claim to be verified rather than a fact to be trusted.
Frequently Asked Questions
Is it legal to buy from a peptide catalog in the United States?
Browsing a peptide catalog is legal, and most research peptides are sold as laboratory chemicals labeled "not for human consumption." However, the FDA has sent warning letters to companies marketing these products for human use, and some states impose additional restrictions. Buying a research peptide does not make it approved or safe for human consumption.
What should I look for in a peptide catalog listing?
Look for a lot-specific certificate of analysis from an independent lab that includes both HPLC purity and mass spectrometry data. The listing should also show the sequence, molecular weight, form, vial size, and storage instructions. A purity percentage with no supporting report or lot number is a weak signal.
Are peptides sold in online catalogs FDA-approved for human use?
No. Most peptides sold through research catalogs are not FDA-approved for human use, even though a small number of peptides exist as prescription drugs in specific formulations. Compounded versions require a prescription from a licensed pharmacy. Anyone considering peptide use for a health condition should consult a healthcare professional.
This page provides educational research information and does not replace medical advice, diagnosis, or treatment.