Sourcing & quality
Know what you’re looking at.
A closer look at laboratory testing, sourcing, and product identity.
The name is only the beginning.
To understand a peptide product, start with its identity. The compound name, formulation, concentration, batch, and intended use describe different parts of what you are looking at.
A certificate of analysis, or COA, records results for the sample tested. The strongest connection is between the report, the exact batch, and an identifiable laboratory with a clearly stated testing method.
Four different questions.
- Identity
- Does the sample contain the compound it claims to contain?
- Purity
- What proportion of the measured sample is the intended compound, under the method used?
- Sterility
- Was the sample tested for viable microorganisms?
- Endotoxins
- Was the sample tested for bacterial endotoxins, which are distinct from living bacteria?
Read identity, purity, sterility, endotoxin, and quantity results separately. Each measurement describes a different property of the sample.
Read beyond the percentage.
Match the details
Check the compound name, lot or batch number, sample identifier, test date, and laboratory details against the product information.
Look at the method
Identify which tests were performed, the units used, and the reporting criteria. Different analytical methods describe different properties.
Check the sample
Ask who supplied the sample, how it was selected, and whether the report can be verified directly with the laboratory.
Keep the record
Keep the product label and its matching report together. Batch-specific information is more useful than a general marketing statement.
Keep the product details together.
Keep the product label and its matching laboratory report together. Include the compound name, formulation, supplier, and batch number so that every record refers to the same product.
