A nanogram is one billionth of a gram, a unit of mass used in laboratory testing to report very small quantities such as trace contaminants. It appears on lab documents alongside related units like parts per million.
In kratom testing, such small units are used to express trace levels of heavy metals or to define detection thresholds on a Certificate of Analysis. See Heavy Metal Testing and COA and Lab Testing.
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Disclaimer: This glossary entry is for educational purposes only and is not intended as medical, legal,
or professional advice. Kratom is not approved by the FDA to diagnose, treat, cure, or prevent any disease.