Test Your Peptide For Free
Send us your peptide sample and get an independent HPLC laboratory test — verifying identity, purity, and quantity. Free base test. Transparent results. Optional paid add-ons available.
Learn how peptide testing works → — understand HPLC, LC-MS, purity, identity, and fill weight before you send your sample.
How the Free Test Works
Our testing service verifies three critical properties of your peptide sample: identity (is it the right peptide?), purity (how much is the target compound?), and fill weight (how much is in the vial?). See how peptide testing works → Here's what happens after you submit the form below.
- Register and request: Enter your email, select your peptide, and fill out the submission form. You'll receive a confirmation email with shipping instructions.
- Ship your sample: Send 0.5-1 mg of your peptide (lyophilized powder) to our testing address. We provide the address after you complete the form.
- Laboratory analysis: Our independent lab reconstitutes your sample and runs HPLC (purity) and LC-MS (identity) analysis. Fill weight is measured by gravimetric analysis.
- Results delivered: Within 5-7 business days, you receive a complete Certificate of Analysis (COA) by email, including chromatograms, mass spectra, and purity data.
Want to learn more about the science? Read our complete guide to how peptide testing works or compare HPLC vs LC-MS methods.
Sample Requirements
Optional Paid Add-ons
- Endotoxin testing (LAL assay): $50 — detects bacterial lipopolysaccharides that cause inflammatory reactions.
- Heavy metals analysis (ICP-MS): $75 — screens for lead, arsenic, mercury, and cadmium contamination.
- Residual solvents (GC-MS): $60 — checks for organic solvents left from the manufacturing process.
- Private/confidential testing: $100 — anonymous sample ID, no personal data stored, results sent via encrypted channel.
For more details on what each test measures, see our identity, purity, and fill weight guide. Learn why a trusted third party peptide testing lab matters for your research.
Confidentiality & Privacy
Your privacy is our priority. Here's what we do and don't do with your data:
- We never share your sample data, results, or personal information with any vendor, third party, or marketing partner.
- We don't publish results or add them to any public database. Your COA is sent only to the email address you provide.
- We don't retain physical samples after testing is complete. Remaining material is destroyed unless you request return.
- Optional private testing ($100 add-on): uses anonymous sample IDs with no personal data attached. Results delivered via encrypted email.
Questions about testing? Check our testing FAQ, read about how the testing process works, or learn about third party peptide testing lab services.
How it works
Submit your request
Fill out the form above with your peptide, vendor, and shipping details.
Get prepaid label
We email you a prepaid shipping label within 24 hours. Mail us your sample.
Lab analysis
Our partner lab runs HPLC + LC-MS analysis on your sample. Identity, purity, fill weight.
Get your results
Full test report emailed to you in 5-7 business days. Pure, underdosed, or fake — you'll know.
Frequently asked questions
Is this really free?
Yes. PepsReview offers free sample testing as part of our mission to bring transparency to the peptide market. The base test (identity, purity, fill weight) is always free. We cover the lab testing and shipping costs. Optional paid add-ons are available if you want additional testing.
What do you test for?
The free base test covers three things: Identity (is it the peptide you ordered?), Purity (what percentage is pure?), and Fill weight (does the vial contain the stated amount?). We use HPLC and LC-MS methods. Paid add-ons include endotoxins ($110), heavy metals ($120), residual solvents ($175), private testing ($120), and premium lab choice ($89).
What are the paid add-on tests?
Endotoxins ($110) — tests for bacterial endotoxin contamination. Heavy Metals ($120) — tests for arsenic, lead, cadmium, mercury. Residual Solvents ($175) — tests for solvent contamination from manufacturing. Private Testing ($120) — your results are not published, sample tested blind. Lab Choice ($89) — premium partner lab with fill weight analysis. All add-ons use the same sample — no additional sample needed.
How much sample do you need?
We need a small amount — typically 1-2mg of reconstituted peptide, or a small portion of your lyophilized vial. You keep the rest.
Will my results be public?
By default, your results are sent privately to your email. We do not publish individual test results or associate them with your name. Aggregated, anonymized data may be used for vendor quality scoring on PepsReview. If you want complete privacy, select the "Private Testing" add-on ($120) and your results will not be published at all.
Which countries do you ship to?
Currently we ship prepaid labels to US, UK, Canada, Australia, and most EU countries. If your country is not listed, select "Other" and we'll try to accommodate.
What happens to my email?
Your email is used to send you the shipping label and test results. We may also send you peptide research updates and vendor alerts — you can unsubscribe at any time. We never share your email with third parties.
How do paid add-ons work?
Select any paid add-ons in step 4 of the form. After we receive your sample, we'll send you a payment link by email. Once payment is confirmed, the additional tests will be performed on the same sample. You only pay for what you select — the base test is always free.