Labeling & Testing for Medical Cannabis

Earlier this year, I became a member of the ASTM D37 technical committee where a group of professionals are working to create global standards for the cannabis industry.  These are essentially guides that can encourage standardization of cultivation, manufacturing, and laboratory practices around the world.  During my work with this amazing group, I have worked closely with Dr. Cindy Orser at Digipath Labs in Las Vegas.  Digipath is an ISO 17025 certified and licensed cannabis testing lab in the state of Nevada.

This article from KTNV Las Vegas highlights labs such as Digipath who are going above and beyond the minimum requirements of the state to ensure products are safe for consumers.  Through their research, they are finding pesticides, mold, yeast, and metals in some cannabis products.  Some of those pesticides and metals aren't required to be tested in the state of Nevada (interestingly enough).

Nevada is one of the states that has a really good handle on labeling and testing.  Patients in this state should feel very comfortable consuming medical cannabis.  However, just as this article indicates, no state is perfect.  There are still opportunities for each one to improve.

What is on the label?

  • Name of marijuana establishment & license #
  • Batch/lot/production run #
  • Date of final harvest/production
  • Date of final testing
  • Date of packaging
  • Cannabinoid profile (including amount of THC per serving for edibles)
  • Terpene profile (top 3)
  • Expiration date (if perishable)
  • Quantity of product
  • Net weight
  • List of all ingredients and major food allergens
  • List of solvents or other chemicals added to product
  • Warning statements

How is product quality ensured?

  • Products must be tested for: moisture content, cannabinoids (THC, THCA, CBD, CBDA, CBN), terpenes, foreign matter, mycotoxins, heavy metals, pesticides, microbials, yeast, and mold (depending on product type).
  • Batches that fail testing must be destroyed
  • Testing facilities must be certified to ISO 17025
  • State performs inspections of cultivation, processing, and testing facilities


  • Department provides limits for contaminants
  • Retesting is allowed on case-by-case basis
  • Homogeneity of edibles must be verified
  • Significant oversight of labeling and testing in the state


  • Perishable items must be tested to confirm shelf-life but how this testing is performed isn’t defined
  • Residual solvents are not tested but are required on the label even though they should have been removed from the product