Research peptides in BaliFor research use only21+ only

Journal

Ten articles on how peptides are tested, what each line of a lab report means and how to check it at the lab.

A clipboard with a handwritten list of steps on a wooden tableReading reports

How to read a Janoshik test report, field by field

A lab report answers a few precise questions. This guide takes one real report from our COA library and reads it one field at a time.

4 min read · 3 sources
Close-up of a laptop keyboardVerification

Do not trust a screenshot: check the report at the lab

3 min readA high-performance liquid chromatography (HPLC) system on a laboratory benchTesting

HPLC purity: what 99% means, and what it leaves out

4 min readA mass spectrometer with its vacuum chambers and magnet, seen from aboveTesting

Identity first: how LC-MS shows what is in the vial

3 min read

All articles

An analytical balance with a glass draft shieldReading reports

Measured content versus the label: why the numbers differ

The label is the amount the vial is meant to hold. The report is the amount the lab found. They are rarely identical.

2 min read · 4 sourcesAn Atlantic horseshoe crab on a gravel beachTesting

Bacterial endotoxin testing, explained

Endotoxin is an easy line to skip on a report. It answers a question that purity never can.

2 min read · 3 sourcesPart of an inductively coupled plasma mass spectrometer (ICP-MS) in a laboratoryTesting

Heavy metals: what "not detected" really means

"Not detected" is the result everyone wants to see. It has a precise meaning, and it is worth knowing it.

2 min read · 3 sourcesBacterial colonies on an agar culture plate (CDC photo, 1979)Testing

TAMC and TYMC: what the microbial counts on a report measure

The last test on each BP report is a pair of microbial counts. Here is what they look for, and what a pass does and does not say.

2 min read · 3 sourcesLabelled sample boxes stacked inside a laboratory freezerHandling

Storing research peptides in a hot, humid climate

A lab report describes the vial on the day it was tested. Heat and moisture decide what it looks like months later.

2 min read · 3 sourcesAn old folding magnifying loupe with three lensesBuying

Eight checks before you trust a peptide supplier

Labels and prices are easy to copy. These eight checks are not.

2 min read · 4 sources

BP sells research materials for laboratory use only. These articles explain laboratory testing and lab reports. They are not medical advice and not instructions for use.