Labels and laboratory reports can help patients compare potency, ingredients and testing, but formats and required tests vary by state.
Potency per serving and package
A package can show total THC or CBD while the serving amount is much smaller. Read units carefully and distinguish milligrams from percentages.
Ingredients and allergens
Edibles, tinctures and topicals may contain common allergens, sweeteners, carrier oils or additional botanicals. Review the complete ingredient list.
Laboratory testing
Testing may include potency, pesticides, solvents, microbes, heavy metals or mycotoxins. A passing result applies to the identified batch, not necessarily every product sold under the same brand.
Warning signs
Be cautious when a product lacks traceable batch information, makes disease-cure claims, uses unclear dosing units or provides a report that does not match the package.
Official sources and further reading
Reviewed for publication in July 2026. Rules, plan terms and agency guidance can change.
Questions about How to Read a Cannabis Product Label and Certificate of Analysis
What is a COA?
A certificate of analysis is a laboratory report tied to a sample or batch.
Does a COA prove a product is safe for everyone?
No. It reports specified tests and does not replace individual medical assessment.
Why do serving size and package total both matter?
Confusing the two can lead to taking substantially more than intended.
What does this page explain?
It explains the main patient issue described in “How to Read a Cannabis Product Label and Certificate of Analysis” and provides practical information, context and next steps for medical cannabis patients.
What should patients verify before acting on this information?
Check current state and federal rules, official agency guidance and any applicable healthcare or benefit-plan requirements because policies can change.