The Great American Peptide Co.
From $200 · 3–5 day turnaround · No account
How it works Pricing FAQ
Independent American Lab

Test your peptide in a real US lab.

Mail us your sample. A few days later, a signed report from our independent American lab tells you what's in the vial, and whether it's clean. From $200 a test. No subscription.

The Great American Peptide Co.
LOT GAPC-2026-A041
Certificate of Analysis · HPLC-UV
Semaglutide · 5 mg
Column C18 · λ 214 nm · 4.6×150 mm · 1.0 mL/min · 25 °C
1 2 3 4 5 6 RETENTION TIME (MIN) mAU 99.80% 0.08% 0.09% 0.03%
HPLC Purity
99.80%
Endotoxin
<0.25EU/mg
Date of Issue
04·2026
ISO/IEC 17025:2017
A2LA Cert No. 1234.01
Independent American lab
Pharmacy-grade safety tests
3–5 day standard turnaround
From $200. No account.
Tested in the USA
HPLC-UV Identity & Purity
LAL Endotoxin Pharmacy-grade
ISO 17025 A2LA Accredited
Chain of Custody Sealed

Three tests. One certificate per peptide.

01 Purity
$200

Identity & purity

HPLC-UV. Tells you what's in the vial and how clean it is. Mass percentage, identified impurities, signed and dated.

02 Endotoxin
$300

Bacterial contamination

The pharmacy-grade safety screen. The same test hospitals run before anything goes into a needle. Pass or fail, the paper says so.

03 Combo
$325save $175

Both tests, one sample

Purity and endotoxin together. Both certificates from one vial. The right pick for first-time vendors and high-stakes batches.

Mail a sample. Get the answer. That's the whole thing.

01 / Mail

Mail your sample

Pre-paid envelope. Powder or liquid, either's fine. Takes a minute at the post office.

02 / Test

We run both tests

One test checks what's actually in your peptide. The other checks it's not contaminated.

03 / Proof

Signed certificate

Signed PDF in your inbox in 3–5 business days. Exactly what a pharmacy would send you.

04 / Archive

Kept forever

We save a copy in our American archive. Pull it up any time. Show it to anyone.

Questions people ask before their first test.

What certifications do you hold?

ISO/IEC 17025 accredited by A2LA. Three labs across Texas, California, and Florida. 20+ years testing for pharmaceutical clients. Every certificate carries our accreditation number and the analyst's signature.

How much peptide do I have to send?

Send the whole vial. Don't worry about measuring. We pull what we need and keep the rest sealed in our archive.

What if it fails the tests?

You still get the certificate. It tells the truth either way. You decide what to do with that information.

What peptides can you test?

Most common research peptides. Semaglutide, tirzepatide, BPC-157, TB-500, and the rest. Not sure? Email us.

Can I send more than one vial?

Yes. Each vial is its own test with its own certificate. Drop them in the same envelope.

How is this different from the vendor's COA?

Their certificate comes from a lab they pay. Ours comes from a lab you pay. We test what's in your vial today, not what was in a batch six months ago.

Stop guessing. Start testing.

From $200. A few days. One vial. One certificate. No account, no contract, no phone call. Just proof.