COA (Certificate of Analysis)

A COA is the lab report a testing laboratory issues for a specific batch of product: cannabinoid percentages, and on a full panel, contaminants like pesticides, heavy metals, and microbials. It is the entire basis of this site’s reviews — not photos, not menu copy. A COA is only as good as three checks: the lab is a real accredited third party, the batch number matches the product you are actually buying, and the math inside adds up. A vendor with no published COAs is not a vendor we review; they are a vendor we skip.