Laboratory research education only. This article does not provide human or veterinary dosing, administration, diagnosis, treatment, or safety guidance.
Two percents that are not the same sentence
BPC-157 task 136728 prints content 10.62% and purity 99.036%. Both use a percent sign. They are not two drafts of one result. 99.036% does not mean the vial is 99% of the label weight, and 10.62% is not a milligram figure. Copy the word next to the number.
A percent can sit next to a milligram
Tesamorelin task 134410 prints 22.59% and purity 98.472%. GLP-RT3 task 149759 prints 22.99 mg and purity 99.576%. One listing reports content as a percent. Another reports it in milligrams. Leave each result in the unit the lab printed. Do not convert the percent into milligrams to make a column line up.
The label is the catalog amount
The shop label is what the listing sells, such as 10 mg or 20 mg. The content line is what the lab measured in the sample it received. Water, counterion, and the calibration of the assay can put that measured result somewhere other than the number on the label.
A difference is a result. It is not a blank to edit back to the label.
A blank purity line stays blank
NAD+ task 157318 prints 929.05 mg and does not print a purity percent. GLOW task 136730 prints GHK-Cu 45.17 mg, BPC-157 11.95 mg, and TB-500 11.55 mg, and it does not print purity. Do not add those three masses and call the total a purity. Do not borrow 99% from a different product that happens to have a purity line.
What to write down
Task number, the word beside the result, and the unit. “Purity 99.036%” or “content 10.62%.” Not “about 99% of 10 mg.”
For reading laboratory reports. 21+. Not for human or veterinary use.
References and further reading
Open the original sources and evaluate their methods, limitations, and applicability independently.
Related education
COAs & TestingCOAs & Testing · 4 min readA Practical Workflow for Verifying COA AuthenticityMatch the task number, the sample name, and the file. A logo and a large percent do not prove the report belongs to that vial.Read article →
COAs & TestingCOAs & Testing · 4 min readHPLC vs. Mass Spectrometry: Different Questions, Complementary EvidenceHPLC sorts a mixture by time on a column. Mass spectrometry sorts ions by mass. One result does not do the other test's job.Read article →
COAs & TestingCOAs & Testing · 7 min readWhat HPLC Testing Measures in Peptide AnalysisLearn how chromatographic separation supports purity assessment and why identity requires additional evidence.Read article →Research-use notice
This material is educational and does not provide medical, dosing, administration, treatment, or human-use guidance. For laboratory research use only.