Non-Detect (ND)

Non-detect or ND is a lab result meaning a substance was not found above the test's detection limit — the strongest practical result for things you want absent, like heavy metals or formamide.

PopsyKosy's EVA returns non-detect for restricted substances in testing. How heavy-metal testing works →

FAQ

What does non-detect mean on a lab report?

Non-detect means the substance was not found above the test's detection limit. It is the result you want for substances that should be absent.