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High value elements A batch or lot number that matches the label on your vial A clear description of the purity method used, such as HPLC, ideally with a chromatogram Identity methods, such as MS or FTIR, with reference values or spectra Assay or potency results, when available The name of the testing lab, preferably independent of the seller The date the tests were performed Lower value signals Vague phrases such as pharma grade without any associated methods or data Generic looking COAs that appear to be reused across different products or lots Bare numbers without any method descriptions Nootropix posts the batch COA directly on the GHK Cu product page
The exceptions to this threshold rule are for Lewis and Hamilton counties, which have no minimum attributed membership required
PMID 31316992
Special considerations for different populations Not everyone responds to these medications the same way
