Heavy metals testing is less common for peptides than purity and identity, but some buyers ask for it, especially wholesale buyers. It is usually done by ICP-MS.
As with any test, only claim it for batches whose reports include it.
Heavy metals testing
A lab test that measures metals such as lead, arsenic, mercury and cadmium in a sample.
See it running on your own catalog
Purity does the work these terms describe: batches held until their lab report is in, payments matched to orders, and wording checked before it sends.