A Certificate of Analysis (COA) is a document provided by a third-party laboratory that provides detailed information about the composition and quality of a specific product. In the context of CBD and cannabis products, COAs are commonly used to verify the content of cannabinoids, terpenes, and other compounds, as well as to ensure that the product is free from contaminants. COAs are essential for transparency and to ensure that consumers are getting the product they expect. This proof of analysis exists to benefit the consumer or retailer as much as the producer; it guarantees quality assurance for all parties. It is important to check for COAs from reputable labs that are independent of the manufacturer to ensure unbiased and accurate testing.