Choose a peptide testing lab by the question you need answered: identity, purity, amount or microbiological quality. Confirm the method and accepted sample first, then compare the full cost and turnaround. This directory links published information; a listing is not an endorsement.
Published examples include $200–$250 USD for the named basic panels below. Broader panels and additional methods cost more. These are different scopes, with source review dates shown below; confirm the current total, shipping and taxes with the provider.
Published examples, not equivalent testing packages or binding quotes
Janoshik describes individual ordering and group submissions. PeptideVerify describes individual research customers. Confirm sample acceptance before shipping.
PeptideVerify describes analysis through a UK partner laboratory. Check the performing lab, sample requirements and current price; a UK service address alone is insufficient.
Some services describe individual submissions, while others focus on commercial projects. Start with the client policy, then ask about your exact compound and sample. A directory listing does not guarantee acceptance.
Start with the result you need, then ask the lab which method fits your compound and sample. “Peptide testing” is not one standard package, and no single result establishes that a product is safe for human use.
Is it the named peptide?
Ask for identity testing, such as mass spectrometry, and the evidence used to identify your exact compound.
A purity percentage alone does not establish identity.
What does the purity percentage mean?
Ask for the HPLC method, chromatogram and reporting basis, including how the peaks are integrated.
Peak-area purity is not the percentage of the entire powder that is peptide.
How much peptide is in the sample?
Ask for a quantitative assay with units such as mg per vial. Confirm the reference standard and how the result is calculated.
A result for one submitted vial does not measure every vial in a batch.
What about microbes or endotoxin?
Request the named microbiological or endotoxin method separately. Confirm the required unopened samples with the laboratory.
HPLC purity, microbial counts, sterility and endotoxin results answer different questions.
Search by lab, country, method or sample form. Open a listing’s sample details before shipping, or select up to three labs for a comparison. Compare Janoshik and MZ Biolabs.
Pharmaceutical laboratory offering analytical, microbiology, raw-material and forensic testing. Enquire about the exact compound and submission requirements.
Biopharmaceutical testing network publishing services for protein analytics, identity, purity and peptide mapping. Work is scoped to the development project and laboratory.
Protein concentrationPurity and identity methodsPeptide mapping
Peptide-testing service with a compound-specific catalogue and a partner laboratory in Michigan. Individual researchers and commercial clients can enquire.
HPLC purity and potencyBatch variation testingSeparate contamination panels
Sample requirements & who can submit
Sample needed
Select the vial count for the named compound. Batch-variation vials must match; shipping instructions follow checkout.
Related toxicology, drug-checking and clinical-research services are available under “Related services.” Their inclusion does not confirm they accept peptide product samples.
Your shortlist
Compare testing laboratories
Choose two or three laboratories above. Compare the scope for your sample, then confirm the details directly before sending it.
Select laboratories using the Compare checkbox on each listing.
How do I verify a peptide COA?
Open the issuing provider’s verification page and check the report ID, sample description, dates and results against your copy. Report verification does not prove that your vial is the tested sample. If anything differs, contact the issuer through its official website.
Compare peptide testing quotes for the same sample and requested results. Ask each lab to name the methods, sample requirements, report deliverables and total cost, including add-ons. A lower price only answers your question if the necessary tests are included.
Do I need a testing laboratory near me?
A nearby peptide testing lab is useful only if it accepts your sample and offers the required methods. A more distant lab may be suitable if its shipping and handling requirements can be met. Confirm these directly before sending anything. The region filter shows listed locations, not guaranteed service coverage.
Prepare a lab enquiry
Choose the questions you need answered. Copy the request and send it through the laboratory’s own contact channel. These fields stay in your browser and are not saved or sent to analytics.
This is a request for information, not a prescribed test panel. Confirm the lab accepts your sample before shipping or paying.
What a listing means
We review the provider’s published service information and link the source on each profile. We have not commissioned comparative tests or independently audited these laboratories. “Published services” means a source exists; it is not a quality score, accreditation check or endorsement.
We do not rank providers by an unsupported “trusted” badge. Prices, turnaround times, sample quantities and payment terms need a current quote from the lab. Check that any claimed accreditation covers the exact method you require.