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VendorVerify

PTB Peptronix

#29 of 30 ranked

Vials tend to hold more than the label (median +17.8%); 1 of 7 vials was more than 10% under.

VendorVerify score72.3
Below marketMarket average 86.4
23.5%of vials failed (2 of 9)

For research use only. VendorVerify sells nothing and takes no money from vendors. No affiliate links, no coupon codes, no paid rankings. How scores work

Every vial we have on file

  • Within ±5% / purity 99%+
  • 5–20% under, overfilled / purity 95–99%
  • Failed: over 20% under, over 50% over, empty or under 95% pure

Dose vs label

7 vials measured · 0 empty

Purity

9 vials measured
Median purity
99.40%
across 9 vials
Median dose vs label
+17.8%
across 7 vials; + means more than the label
Failed vials
23.5%
2 of 9 vials; the rate weights each lab report equally and recent reports more, as the score does
Lab reports
9
Jun 10, 2025 to Oct 5, 2026

Labs: Freedom Diagnostics, Janoshik, Liquilabs, Peptide Test, Prime Analytical Laboratories, LLC

Key facts

  • VendorVerify holds third-party lab results for 9 PTB vials from 9 lab reports, dated Jun 2025 to Oct 2026.
  • 2 of 9 PTB vials failed: empty, under 95% pure, more than 20% under the label or more than 50% over it.
  • The median PTB vial tested at 99.40% purity across 9 vials with a purity result.
  • The median PTB vial held +17.8% compared with its label across 7 vials where the lab measured the amount.
  • Buyers have had 4 different compounds from PTB lab tested.
  • PTB ranks #29 of 30 ranked vendors on the VendorVerify score.
  • PTB vials on file were tested by Freedom Diagnostics, Janoshik, Liquilabs, Peptide Test, Prime Analytical Laboratories, LLC.

By peptide

PeptideVialsFailedMedian purityMedian dose vs labelDose vs label, −20% to +20%
Retatrutide5299.40%+7.9%
Tirzepatide2096.53%+19.4%
BPC-1571099.70%+32.8%
CJC-1295 NoDAC / Ipamorelin1099.89%——

Lab reports

One row per tested vial, newest first.

DatePeptideLabLabelMeasuredDose vs labelPurity
Oct 5, 2026RetatrutideBatch Blue Cap / Silver CrimpJanoshik20 mg24.47 mg+22.3%99.64%
Sep 4, 2026TirzepatideBatch 1030-ORN-07026Freedom Diagnostics30 mg36.87 mg+22.9%96.10%
Sep 2, 2026RetatrutideBatch PTB-RT20-202607Liquilabs20 mg19.6 mg−2.0%99.50%
Aug 22, 2026TirzepatideBatch Clear Cap/Gold CrimpFreedom Diagnostics60 mg69.5 mg+15.8%96.95%
Aug 15, 2026CJC-1295 NoDAC / IpamorelinBatch Red CapFreedom Diagnostics10 mg——99.89%
Jul 9, 2026RetatrutideBatch PTB-R20-202604Janoshik—21.33 mg—92.26%
Jun 2, 2026RetatrutideBatch 20196Prime Analytical Laboratories, LLC10 mg7.97 mg−20.3%99.40%
Jun 13, 2025BPC-157Batch Yellow cap-bpc10Peptide Test10 mg13.28 mg+32.8%99.70%
Jun 10, 2025RetatrutideBatch Blue cap; RT-20Peptide Test20 mg23.558 mg+17.8%98.50%

Other lab tests

Endotoxin, TFA, counterion and contaminant checks, as reported by the lab. They are shown for transparency and are not part of the score.

DatePeptideTestResultLab
Oct 6, 2026RetatrutideBatch Blue Cap / Silver CrimpEndotoxin<1 EU/VialJanoshik
Sep 4, 2026TirzepatideBatch 1030-ORN-07026EndotoxinPassFreedom Diagnostics
Sep 2, 2026RetatrutideBatch PTB-RT20-202607Endotoxin0.008 EU/mgLiquilabs
Aug 22, 2026TirzepatideBatch Clear Cap/Gold CrimpEndotoxinPassFreedom Diagnostics
Aug 15, 2026CJC-1295 NoDAC / IpamorelinBatch Red CapEndotoxin≤0.05 EU/mLFreedom Diagnostics

PTB: common questions

Is PTB legit?

We can't vouch for any vendor as a business, and we don't sell or recommend products. What we can show is what buyers' independent lab tests found: 2 of 9 PTB vials on file failed, meaning they were empty, under 95% pure, more than 20% under the label or more than 50% over it. That places PTB #29 of 30 ranked vendors, below market on our score. Results on file run from Jun 2025 to Oct 2026.

Has PTB been third-party tested?

Yes. We hold results for 9 PTB vials from 9 lab reports, tested by Freedom Diagnostics, Janoshik, Liquilabs, Peptide Test, Prime Analytical Laboratories, LLC. Each result comes from a lab report a buyer paid for, not from a certificate the vendor supplied.

Are PTB vials dosed correctly?

Across 7 vials where the lab measured the amount, the median PTB vial held +17.8% compared with its label. 1 of 7 held more than 10% less than the label said.

How pure is PTB?

The median PTB vial tested at 99.40% purity across 9 vials with a purity result. We count anything under 95% as a failed vial, and a vial at 99.5% or higher gets full marks for purity.

Does PTB pay to be listed or ranked?

No. VendorVerify sells nothing and takes no money from vendors. No affiliate links, no coupon codes, no paid rankings. A vendor's place comes only from lab results.

Will my PTB vial match these results?

Not necessarily. A lab report describes the vials that were tested, and batches differ. A clean record lowers the odds of a bad vial but doesn't rule one out, which is why newer reports count for more in the score.

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