How to Read Cannabis Lab Reports: Cannabinoids, Terpenes, and Contaminant Screening

A cannabis lab report, often called a certificate of analysis (COA), records results from testing a particular sample. It can help readers check a product’s measured composition and whether selected contaminants were detected. It is not a guarantee of quality, safety in every circumstance, or a prediction of how someone will feel. Reading the report carefully means checking what was tested, how results are presented, and what the test did not cover.

Start with the sample and the laboratory

Look for the product name, batch or lot number, sample type, collection date, and date of analysis. These details help establish whether the report relates to the item being considered. A result for one batch does not automatically apply to another, and an old report may not reflect a product’s current formulation or condition.

Check the laboratory’s name and whether its testing is performed under an appropriate accreditation or quality system. The report may identify the analytical methods used and include a unique report number. If essential details are missing, or the batch identifier does not match the product label, the numbers are harder to interpret. A lab report is most useful when it can be traced to a specific sample and testing process.

Understand cannabinoid figures

Cannabinoid tables commonly list THC, THCA, CBD, and CBDA, along with smaller amounts of other compounds. The labels matter: THCA is the acidic form of THC, and CBD and CBDA are distinct compounds. Some reports also provide “total THC” or “total CBD,” calculated estimates that account for the potential conversion of an acidic cannabinoid during heating. These values are not necessarily the amount present in the unheated sample.

Read the units and basis of measurement. Results may be shown as a percentage by weight, milligrams per gram, or milligrams per package. A percentage on a flower sample cannot be directly compared with milligrams per serving in an edible without considering the product’s weight and serving size. Reports may also distinguish results “as received” from results adjusted to a dry-weight basis. Moisture and calculation conventions can affect comparisons, so use like-for-like figures whenever possible.

Consumers may see product descriptions alongside test information on retail or brand pages, including jungleboysofficial.uk, but the relevant batch report should be checked independently rather than inferred from general product copy. A listed potency figure is meaningful only when its source, units, and connection to the tested batch are clear.

Read terpene results with care

Terpenes are aromatic compounds that contribute to a cannabis product’s scent and flavor. A terpene panel may list individual compounds in percentages or in milligrams per gram, sometimes with a total terpene figure. Compare the units before ranking products, and note whether the lab reports only selected terpenes or a broader panel.

Terpene levels can vary between batches and may change with handling and storage. Their presence can describe chemical composition, but a report alone does not establish a specific effect or prove that two products will feel alike. Treat sensory and effect descriptions as separate claims requiring their own context.

Check contaminant screening and its limits

Depending on the rules in the relevant jurisdiction, a COA may include screening for pesticides, heavy metals, microbial contaminants, mycotoxins, or residual solvents. Find the result for each category and check whether it says “pass,” “not detected,” or gives a measured value. A result marked “not detected” means the substance was not found above the method’s reporting threshold; it does not necessarily mean absolute zero.

Look for the action limit or acceptance criteria used to determine a pass. The detection limit and units matter because different methods can identify different minimum concentrations. A panel also covers only the substances tested. If a report lists cannabinoids and terpenes but no contaminant screens, it should not be treated as evidence that those other categories were assessed.

Use the report as one piece of evidence

Compare reports only when the product type, units, batch details, and testing scope are reasonably consistent. Ask the seller or laboratory for clarification when a result is ambiguous, a report is incomplete, or the sample cannot be matched to the package. A COA can support informed comparison, but it is a snapshot of a tested sample—not a substitute for clear labeling, applicable regulations, or professional health advice.