Start with the batch, not the headline number
The first check is whether the CoA belongs to the exact batch being sold. A useful certificate should make the sample, batch identifier, test date, method, and result traceable.[3][1]
ISO/IEC 17025 helps testing laboratories demonstrate competence and the ability to generate valid results; it does not by itself say that a peptide has a clinical effect.[1]
Read HPLC and LC-MS as separate signals
HPLC is commonly used to separate components in a peptide sample and estimate purity by peak area, while mass spectrometry is used to support molecular identity.[4]
Regulatory analytical guidance treats validation as a question of fitness for purpose: accuracy, specificity, precision, range, and related characteristics matter when a method supports a quality decision.[2]
What this means for buyers
For buyers, a clean-looking purity percentage is useful only when the certificate also shows what method produced it and which batch it belongs to.
How Peptyds approaches this
Peptyds should keep quality proof close to the product page: batch code first, method context second, and plain-language interpretation third.
What a CoA cannot promise
A CoA is not medical advice, a treatment claim, or proof that a product will produce a specific outcome. It is a quality and identity document.[3]
If a certificate hides the lab, method, date, or batch match, treat the document as incomplete until those details are clarified.[1][2]