Crescent Bioresearch Publishes BPC-157 Endotoxin Certificate: Below 5 EU per Vial

Oct 22, 2026

The endotoxin result for BPC-157 lot CBR-BPC-260403-001 is less than 5 EU per vial, the lowest amount the test could read. The threshold is 350 EU per vial and the lysate sensitivity is 0.05 EU/mL.

Albany, United States, October 22, 2026 -- ALBANY, N.Y., Oct. 21, 2026 -- Crescent Bioresearch, a supplier of laboratory compounds, has published the certificate of analysis for BPC-157 lot CBR-BPC-260403-001. The endotoxin result is less than 5 EU per vial, the threshold is 350 EU per vial, the lysate sensitivity is 0.05 EU/mL, and the lot passed.

BPC-157, also known as Pentadecapeptide BPC 157, PL 14736, Bepecin, PL-10 and PLD-116, sequence GEPPPGKPADDAGLV, CAS 137525-51-0, is supplied by Crescent Bioresearch for laboratory research.

Signed BTLabs endotoxin report for BPC-157 10 mg, lot CBR-BPC-260403-001, with the result, sensitivity and threshold highlighted. Result below 5 EU per vial, threshold 350 EU per vial, lysate sensitivity 0.05 EU/mL, determination PASS. Kinetic turbidimetric LAL, USP 85.

What was measured

Endotoxin is lipopolysaccharide, a component of the cell wall of Gram-negative bacteria. It is released when the bacteria die, it survives sterilization, and it can be present in any compound that passed through a place where bacteria were present. The Limulus amebocyte lysate (LAL) test, performed under USP General Chapter 85, Bacterial Endotoxins Test, measures it in endotoxin units (EU). BTLabs, an independent laboratory in West Palm Beach, Florida, tested this lot on Sept. 24, 2026, with the vial dissolved in 2 mL for the test. The vial holds 10 mg, so the result is less than 0.5 EU per milligram.

What a result below the detection limit tells a research entity

Every endotoxin test has a lowest amount it can detect. For this lot, at the dilution used, that amount is 5 EU per vial, and the laboratory found nothing above it. The certificate reports the result as "less than 5 EU per vial" and states on the page that results reported this way are below the limit of detection for the assay. The vial therefore contains somewhere between zero and 5 EU, and the certificate tells the research entity exactly that.

A result like this is sometimes restated as "endotoxin free" or "none detected." Those phrases drop the detection limit, which is the figure a research entity uses. A research entity whose own requirement is 10 EU per vial can confirm from this certificate that the lot meets it. A research entity whose requirement is 1 EU per vial can see from this certificate that the test did not look that low, and that a test with a lower detection limit is needed before the lot is cleared for that work. Both decisions depend on the limit being printed.

A school exam shows the same thing

A student's report card says "pass." The passing mark is 65. The student could have scored 66 or 100, and the word "pass" does not say which. Only the score does.

The BPC-157 certificate prints the score: less than 5 EU per vial, against a threshold of 350. "Less than 5" is the lowest amount the test can detect, so it means the test found no endotoxin down to that level. The certificate prints that figure rather than writing "endotoxin free," because a research entity that needs a lower limit, such as 1 EU per vial, has to know how low the test could see.

Why the number must be on the certificate

A pass is the outcome of comparing a measured value against a threshold. When a certificate shows the pass and neither of the two figures behind it, nobody reading the certificate can repeat the comparison. The laboratory may have measured 2 EU or 300; the threshold may have been 40 or 1,000. A certificate like that records that a test took place and nothing else, and it cannot be taken as data.

For a result below detection, the number is the detection limit. The BPC-157 certificate prints "less than 5 EU per vial" rather than a word such as "endotoxin free." That figure is what allows a research entity to rule endotoxin out as the cause of what it observes, and to attribute its results to BPC-157 itself. A marked-up endotoxin page for another Crescent Bioresearch lot labels each of the four figures where it sits on the certificate.

"A result below detection is the best outcome an endotoxin test can give, and it still comes with a number," Crescent Bioresearch said. "That number tells a research entity whether the test looked low enough for its work. 'Endotoxin free' would not."

SOURCE DOCUMENTS

Bacterial Endotoxins Test report COA261647-005, issued by BTLabs, West Palm Beach, Florida, for BPC-157 lot CBR-BPC-260403-001, tested Sept. 24, 2026, by LAL; USP General Chapter 85, Bacterial Endotoxins Test.

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BPC-157 product page (for research entities): crescentbioresearch.com/bpc-157

Read this release on Crescent Bioresearch: crescentbioresearch.com/press/bpc-157-endotoxin-detection-limit

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