Independent peptide investigation

Follow the sample.
Read the result.

We source research peptides independently, document their path to the lab, and publish third-party findings on identity, purity, and net content in mg. Every outcome is public.

See the test results Support testing

Samples tested: –
Suppliers: –
Independent labs: –
COAs published: –

Public record

Test results

Measured net content against the label claim, purity, and identity for each vial, graded A–F — with the original lab report one click away.

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			Claim			Identity			COA

How to read these results

Each result describes one tested sample. It is not a certification of a supplier, a lot, or anything else in a catalog, and it is not a determination that a product is suitable for human use. Supplier, lot, and manufacturing details come from our inventory records; independent chain-of-custody documents for these samples are not yet published.

Identity. For the peptide samples, the lab reports a main HPLC-UV peak at the expected retention time for the named compound. That is shown as “Expected peptide peak detected (HPLC-UV)”: the lab did not issue a formal identity statement, and no mass spectrometry was run. “Identity confirmed” appears only where the lab’s report states identity as confirmed — here, the benzyl alcohol in the bacteriostatic water samples (retention-time match vs. a same-day reference standard).

Disclosure. Results apply only to the specific vial tested, as received by the lab. They may indicate the quality of the lot it came from, but they do not certify any other vial, lot, or batch. Investigate Peptides publishes laboratory findings only and makes no claims about safety or fitness for any use.

Grading scale

Each sample gets two sub-grades from the lab’s numbers. The overall grade is the lower of the two.

Purity (HPLC peak area)
A	99% or higher
B	98–98.99%
C	97–97.99%
D	95–96.99%
F	Below 95%

Content as % of label claim
A	95% or more (no upper limit)
B	90–94.99%
C	80–89.99%
D	70–79.99%
F	Below 70%

Overfill is not penalized: any content at or above 95% of the label claim grades A. Content above 120% of the label claim is flagged with a neutral overfill note so dosing calculations can be checked; the flag does not change the grade. Bacteriostatic water has no label claim or purity test, so its measured benzyl alcohol is graded on the content scale against the typical ≈0.9% w/v level, and that is its overall grade. Grades summarize measured values only; they are not a certification or a safety rating.

Sample-specific evidence

Tested suppliers

Every supplier we have published results for, built directly from the records above. Choose one to filter the results to its samples.

Listings are evidence records, not endorsements or certifications.

Our process

A traceable path from vial to report.

A supplier’s own COA can’t tell you what a separately bought vial contains. So we buy our own, send them to a lab, and show you what came back.

01
Source
Purchase or receive the vial. Record supplier, retailer, peptide, lot, date, and any product or funding relationship.
02
Document
Capture packaging and vial labels, assign a sample ID, and retain the original handling record.
03
Submit
Record packing, shipment, receiving lab, requested tests, and the IDs connecting the vial to the report.
04
Publish
Post identity, purity, measured net content, and source documents regardless of outcome.
05
Cross-check
When the same lot is tested at multiple facilities, display the reports together and explain differences.

Independent sourcing

We disclose whether a vial was purchased or received and identify the source for each result.

Documented handling

Each record can include packaging, labeling, shipment, and laboratory documents.

Every outcome

Failures and inconclusive findings stay public. Same-lot tests at multiple labs are linked.

Support the work

Help fund independent testing.

Contributions help cover samples, laboratory fees, shipping, and public documentation. Funding does not influence which outcomes we publish.

Donation options coming soon

Verified destinations will be added here for:

Venmo
Zelle
Trust Wallet
Coinbase

This site does not collect payments today. A contribution never buys an endorsement or a favorable result.

Follow the sample.Read the result.

Test results

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Tested suppliers

A traceable path from vial to report.

Source

Document

Submit